40168542406061 has 4 divisors (see below), whose sum is σ = 40204762914300. Its totient is φ = 40132321897824.

The previous prime is 40168542406039. The next prime is 40168542406117. The reversal of 40168542406061 is 16060424586104.

40168542406061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11955129149161 + 28213413256900 = 3457619^2 + 5311630^2 .

It is a cyclic number.

It is not a de Polignac number, because 40168542406061 - 2⁶ = 40168542405997 is a prime.

It is a super-2 number, since 2×40168542406061² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40168542405997 and 40168542406015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40168542406021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18110252456 + ... + 18110254673.

It is an arithmetic number, because the mean of its divisors is an integer number (10051190728575).

Almost surely, 2^{40168542406061} is an apocalyptic number.

It is an amenable number.

40168542406061 is a deficient number, since it is larger than the sum of its proper divisors (36220508239).

40168542406061 is a wasteful number, since it uses less digits than its factorization.

40168542406061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36220508238.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 40168542406061 in words is "forty trillion, one hundred sixty-eight billion, five hundred forty-two million, four hundred six thousand, sixty-one".