40026405161 has 4 divisors (see below), whose sum is σ = 40036363524. Its totient is φ = 40016446800.

The previous prime is 40026405151. The next prime is 40026405179. The reversal of 40026405161 is 16150462004.

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 8144160025 + 31882245136 = 90245^2 + 178556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40026405161 is a prime.

It is a super-2 number, since 2×40026405161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40026405101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4973150 + ... + 4981191.

It is an arithmetic number, because the mean of its divisors is an integer number (10009090881).

Almost surely, 2^40026405161 is an apocalyptic number.

It is an amenable number.

40026405161 is a deficient number, since it is larger than the sum of its proper divisors (9958363).

40026405161 is an equidigital number, since it uses as much as digits as its factorization.

40026405161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9958362.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 40026405161 its reverse (16150462004), we get a palindrome (56176867165).

The spelling of 40026405161 in words is "forty billion, twenty-six million, four hundred five thousand, one hundred sixty-one".