57032721647 has 12 divisors (see below), whose sum is σ = 62856975720. Its totient is φ = 51708885360.

The previous prime is 57032721637. The next prime is 57032721653. The reversal of 57032721647 is 74612723075.

It is not a de Polignac number, because 57032721647 - 2⁶ = 57032721583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57032721598 and 57032721607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57032721637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586697 + ... + 676962.

It is an arithmetic number, because the mean of its divisors is an integer number (5238081310).

Almost surely, 2^57032721647 is an apocalyptic number.

57032721647 is a deficient number, since it is larger than the sum of its proper divisors (5824254073).

57032721647 is a wasteful number, since it uses less digits than its factorization.

57032721647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264054 (or 1264043 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 57032721647 in words is "fifty-seven billion, thirty-two million, seven hundred twenty-one thousand, six hundred forty-seven".