57255722172 has 72 divisors (see below), whose sum is σ = 158126575152. Its totient is φ = 17323891200.

The previous prime is 57255722131. The next prime is 57255722179. The reversal of 57255722172 is 27122755275.

It is a happy number.

57255722172 is a `hidden beast` number, since 5 + 7 + 2 + 5 + 572 + 2 + 1 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57255722179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152388 + ... + 371124.

Almost surely, 2^57255722172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57255722172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79063287576).

57255722172 is an abundant number, since it is smaller than the sum of its proper divisors (100870852980).

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

57255722172 is a wasteful number, since it uses less digits than its factorization.

57255722172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219419 (or 219414 counting only the distinct ones).

The product of its digits is 686000, while the sum is 45.

The spelling of 57255722172 in words is "fifty-seven billion, two hundred fifty-five million, seven hundred twenty-two thousand, one hundred seventy-two".