40157742123 has 12 divisors (see below), whose sum is σ = 58988774520. Its totient is φ = 26318067936.

The previous prime is 40157742113. The next prime is 40157742133. The reversal of 40157742123 is 32124775104.

40157742123 is a `hidden beast` number, since 40 + 1 + 577 + 4 + 21 + 23 = 666.

It is an interprime number because it is at equal distance from previous prime (40157742113) and next prime (40157742133).

It is not a de Polignac number, because 40157742123 - 2²⁰ = 40156693547 is a prime.

It is a super-2 number, since 2×40157742123² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40157742113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37812786 + ... + 37813847.

It is an arithmetic number, because the mean of its divisors is an integer number (4915731210).

Almost surely, 2^40157742123 is an apocalyptic number.

40157742123 is a deficient number, since it is larger than the sum of its proper divisors (18831032397).

40157742123 is a wasteful number, since it uses less digits than its factorization.

40157742123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75626698 (or 75626695 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 40157742123 in words is "forty billion, one hundred fifty-seven million, seven hundred forty-two thousand, one hundred twenty-three".