40235665621161 has 24 divisors (see below), whose sum is σ = 54467215832160. Its totient is φ = 26420014411840.

The previous prime is 40235665621127. The next prime is 40235665621199. The reversal of 40235665621161 is 16112656653204.

It is a happy number.

It is not a de Polignac number, because 40235665621161 - 2⁷ = 40235665621033 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40235665621161.

It is not an unprimeable number, because it can be changed into a prime (40235665621121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14104861 + ... + 16715813.

It is an arithmetic number, because the mean of its divisors is an integer number (2269467326340).

Almost surely, 2^{40235665621161} is an apocalyptic number.

It is an amenable number.

40235665621161 is a deficient number, since it is larger than the sum of its proper divisors (14231550210999).

40235665621161 is a wasteful number, since it uses less digits than its factorization.

40235665621161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612117 (or 2612046 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 40235665621161 in words is "forty trillion, two hundred thirty-five billion, six hundred sixty-five million, six hundred twenty-one thousand, one hundred sixty-one".