57697821720 has 512 divisors, whose sum is σ = 240869376000. Its totient is φ = 11934881280.

The previous prime is 57697821707. The next prime is 57697821733. The reversal of 57697821720 is 2712879675.

It is a happy number.

57697821720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57697821707) and next prime (57697821733).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19873789 + ... + 19876691.

It is an arithmetic number, because the mean of its divisors is an integer number (470448000).

Almost surely, 2^57697821720 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 57697821720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120434688000).

57697821720 is an abundant number, since it is smaller than the sum of its proper divisors (183171554280).

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

57697821720 is a wasteful number, since it uses less digits than its factorization.

57697821720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180 (or 3170 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 57697821720 in words is "fifty-seven billion, six hundred ninety-seven million, eight hundred twenty-one thousand, seven hundred twenty".