40656019501 has 4 divisors (see below), whose sum is σ = 40677543900. Its totient is φ = 40634495104.

The previous prime is 40656019463. The next prime is 40656019507. The reversal of 40656019501 is 10591065604.

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 19930098276 + 20725921225 = 141174^2 + 143965^2 .

It is a cyclic number.

It is not a de Polignac number, because 40656019501 - 2⁹ = 40656018989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40656019507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10759366 + ... + 10763143.

It is an arithmetic number, because the mean of its divisors is an integer number (10169385975).

Almost surely, 2^40656019501 is an apocalyptic number.

It is an amenable number.

40656019501 is a deficient number, since it is larger than the sum of its proper divisors (21524399).

40656019501 is a wasteful number, since it uses less digits than its factorization.

40656019501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21524398.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 40656019501 in words is "forty billion, six hundred fifty-six million, nineteen thousand, five hundred one".