40243663156165 has 24 divisors (see below), whose sum is σ = 59133545868960. Its totient is φ = 26143251851808.

The previous prime is 40243663156163. The next prime is 40243663156171. The reversal of 40243663156165 is 56165136634204.

It is not a de Polignac number, because 40243663156165 - 2¹ = 40243663156163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243663156163) 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, 4322622967 + ... + 4322632276.

It is an arithmetic number, because the mean of its divisors is an integer number (2463897744540).

Almost surely, 2^{40243663156165} is an apocalyptic number.

It is an amenable number.

40243663156165 is a deficient number, since it is larger than the sum of its proper divisors (18889882712795).

40243663156165 is a wasteful number, since it uses less digits than its factorization.

40243663156165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645255281 (or 8645255274 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 40243663156165 in words is "forty trillion, two hundred forty-three billion, six hundred sixty-three million, one hundred fifty-six thousand, one hundred sixty-five".