40005000157 has 4 divisors (see below), whose sum is σ = 40096128160. Its totient is φ = 39913872156.

The previous prime is 40005000149. The next prime is 40005000181. The reversal of 40005000157 is 75100050004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40005000157 - 2³ = 40005000149 is a prime.

It is the 200013-rd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40005000107) by changing a digit.

It is a nontrivial repunit in base 200012.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45563343 + ... + 45564220.

It is an arithmetic number, because the mean of its divisors is an integer number (10024032040).

Almost surely, 2^40005000157 is an apocalyptic number.

It is an amenable number.

40005000157 is a deficient number, since it is larger than the sum of its proper divisors (91128003).

40005000157 is an equidigital number, since it uses as much as digits as its factorization.

40005000157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91128002.

The product of its (nonzero) digits is 700, while the sum is 22.

The spelling of 40005000157 in words is "forty billion, five million, one hundred fifty-seven", and thus it is an aban number.