57221263638 has 96 divisors (see below), whose sum is σ = 159901896960. Its totient is φ = 14350150080.

The previous prime is 57221263633. The next prime is 57221263651. The reversal of 57221263638 is 83636212275.

57221263638 is a `hidden beast` number, since 5 + 7 + 2 + 2 + 1 + 2 + 6 + 3 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 57221263593 and 57221263602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57221263633) 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, 671620 + ... + 752007.

It is an arithmetic number, because the mean of its divisors is an integer number (1665644760).

Almost surely, 2^57221263638 is an apocalyptic number.

57221263638 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

57221263638 is an abundant number, since it is smaller than the sum of its proper divisors (102680633322).

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

57221263638 is a wasteful number, since it uses less digits than its factorization.

57221263638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423682 (or 1423679 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 57221263638 in words is "fifty-seven billion, two hundred twenty-one million, two hundred sixty-three thousand, six hundred thirty-eight".