40172997832 has 32 divisors (see below), whose sum is σ = 82383350400. Its totient is φ = 18213496000.

The previous prime is 40172997829. The next prime is 40172997883. The reversal of 40172997832 is 23879927104.

It is a super-2 number, since 2×40172997832² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40172997832.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552544 + ... + 621007.

It is an arithmetic number, because the mean of its divisors is an integer number (2574479700).

Almost surely, 2^40172997832 is an apocalyptic number.

It is an amenable number.

40172997832 is an abundant number, since it is smaller than the sum of its proper divisors (42210352568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40172997832 is a wasteful number, since it uses less digits than its factorization.

40172997832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173957 (or 1173953 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 40172997832 in words is "forty billion, one hundred seventy-two million, nine hundred ninety-seven thousand, eight hundred thirty-two".