57000721630 has 16 divisors (see below), whose sum is σ = 102644871840. Its totient is φ = 22790605792.

The previous prime is 57000721627. The next prime is 57000721633. The reversal of 57000721630 is 3612700075.

It is an interprime number because it is at equal distance from previous prime (57000721627) and next prime (57000721633).

It is a junction number, because it is equal to n+sod(n) for n = 57000721592 and 57000721601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57000721633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185610 + ... + 1232749.

It is an arithmetic number, because the mean of its divisors is an integer number (6415304490).

Almost surely, 2^57000721630 is an apocalyptic number.

57000721630 is a deficient number, since it is larger than the sum of its proper divisors (45644150210).

57000721630 is a wasteful number, since it uses less digits than its factorization.

57000721630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420723.

The product of its (nonzero) digits is 8820, while the sum is 31.

The spelling of 57000721630 in words is "fifty-seven billion, seven hundred twenty-one thousand, six hundred thirty".