57994721670 has 64 divisors (see below), whose sum is σ = 143167875840. Its totient is φ = 15024256128.

The previous prime is 57994721599. The next prime is 57994721671. The reversal of 57994721670 is 7612749975.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 57994721670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57994721671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691849 + ... + 771131.

It is an arithmetic number, because the mean of its divisors is an integer number (2236998060).

Almost surely, 2^57994721670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57994721670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71583937920).

57994721670 is an abundant number, since it is smaller than the sum of its proper divisors (85173154170).

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

57994721670 is a wasteful number, since it uses less digits than its factorization.

57994721670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79989.

The product of its (nonzero) digits is 6667920, while the sum is 57.

The spelling of 57994721670 in words is "fifty-seven billion, nine hundred ninety-four million, seven hundred twenty-one thousand, six hundred seventy".