40256507123973 has 18 divisors (see below), whose sum is σ = 67641886120614. Its totient is φ = 23003718356304.

The previous prime is 40256507123873. The next prime is 40256507123993. The reversal of 40256507123973 is 37932170565204.

40256507123973 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 6 + 507 + 123 + 9 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36615653881569 + 3640853242404 = 6051087^2 + 1908102^2 .

It is not a de Polignac number, because 40256507123973 - 2¹⁸ = 40256506861829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40256507123993) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45642297886 + ... + 45642298767.

Almost surely, 2^{40256507123973} is an apocalyptic number.

It is an amenable number.

40256507123973 is a deficient number, since it is larger than the sum of its proper divisors (27385378996641).

40256507123973 is a wasteful number, since it uses less digits than its factorization.

40256507123973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91284596673 (or 91284596663 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The spelling of 40256507123973 in words is "forty trillion, two hundred fifty-six billion, five hundred seven million, one hundred twenty-three thousand, nine hundred seventy-three".