39172428537 has 32 divisors (see below), whose sum is σ = 58842464256. Its totient is φ = 22964726400.

The previous prime is 39172428523. The next prime is 39172428539. The reversal of 39172428537 is 73582427193.

It is not a de Polignac number, because 39172428537 - 2⁷ = 39172428409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39172428537.

It is not an unprimeable number, because it can be changed into a prime (39172428539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2686288 + ... + 2700830.

It is an arithmetic number, because the mean of its divisors is an integer number (1838827008).

Almost surely, 2^39172428537 is an apocalyptic number.

It is an amenable number.

39172428537 is a deficient number, since it is larger than the sum of its proper divisors (19670035719).

39172428537 is a wasteful number, since it uses less digits than its factorization.

39172428537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17221.

The product of its digits is 2540160, while the sum is 51.

The spelling of 39172428537 in words is "thirty-nine billion, one hundred seventy-two million, four hundred twenty-eight thousand, five hundred thirty-seven".