57120421068 has 144 divisors (see below), whose sum is σ = 158355375360. Its totient is φ = 17309376000.

The previous prime is 57120421063. The next prime is 57120421081. The reversal of 57120421068 is 86012402175.

57120421068 is a `hidden beast` number, since 57 + 120 + 421 + 0 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (57120421063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1173618 + ... + 1221318.

Almost surely, 2^57120421068 is an apocalyptic number.

57120421068 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57120421068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79177687680).

57120421068 is an abundant number, since it is smaller than the sum of its proper divisors (101234954292).

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

57120421068 is a wasteful number, since it uses less digits than its factorization.

57120421068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47808 (or 47803 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 57120421068 in words is "fifty-seven billion, one hundred twenty million, four hundred twenty-one thousand, sixty-eight".