57631344420 has 96 divisors (see below), whose sum is σ = 174071237760. Its totient is φ = 14162457600.

The previous prime is 57631344409. The next prime is 57631344461. The reversal of 57631344420 is 2444313675.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407311 + ... + 530249.

It is an arithmetic number, because the mean of its divisors is an integer number (1813242060).

Almost surely, 2^57631344420 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 57631344420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87035618880).

57631344420 is an abundant number, since it is smaller than the sum of its proper divisors (116439893340).

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

57631344420 is a wasteful number, since it uses less digits than its factorization.

57631344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123565 (or 123563 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 57631344420 in words is "fifty-seven billion, six hundred thirty-one million, three hundred forty-four thousand, four hundred twenty".