57172561950 has 48 divisors (see below), whose sum is σ = 162043378560. Its totient is φ = 13068013920.

The previous prime is 57172561891. The next prime is 57172561969. The reversal of 57172561950 is 5916527175.

It is a self number, because there is not a number n which added to its sum of digits gives 57172561950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27223980 + ... + 27226079.

It is an arithmetic number, because the mean of its divisors is an integer number (3375903720).

Almost surely, 2^57172561950 is an apocalyptic number.

57172561950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

57172561950 is an abundant number, since it is smaller than the sum of its proper divisors (104870816610).

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

57172561950 is a wasteful number, since it uses less digits than its factorization.

57172561950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54450081 (or 54450076 counting only the distinct ones).

The product of its (nonzero) digits is 661500, while the sum is 48.

The spelling of 57172561950 in words is "fifty-seven billion, one hundred seventy-two million, five hundred sixty-one thousand, nine hundred fifty".