40505251538 has 16 divisors (see below), whose sum is σ = 60906665664. Its totient is φ = 20203057200.

The previous prime is 40505251513. The next prime is 40505251541. The reversal of 40505251538 is 83515250504.

40505251538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5320931 + ... + 5328537.

It is an arithmetic number, because the mean of its divisors is an integer number (3806666604).

Almost surely, 2^40505251538 is an apocalyptic number.

40505251538 is a deficient number, since it is larger than the sum of its proper divisors (20401414126).

40505251538 is a wasteful number, since it uses less digits than its factorization.

40505251538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13777.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 40505251538 in words is "forty billion, five hundred five million, two hundred fifty-one thousand, five hundred thirty-eight".