57032721648 has 160 divisors (see below), whose sum is σ = 196938585600. Its totient is φ = 15437412864.

The previous prime is 57032721637. The next prime is 57032721653. The reversal of 57032721648 is 84612723075.

57032721648 is a `hidden beast` number, since 5 + 70 + 327 + 216 + 48 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438861 + ... + 553772.

It is an arithmetic number, because the mean of its divisors is an integer number (1230866160).

Almost surely, 2^57032721648 is an apocalyptic number.

It is an amenable number.

57032721648 is an abundant number, since it is smaller than the sum of its proper divisors (139905863952).

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

57032721648 is a wasteful number, since it uses less digits than its factorization.

57032721648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992676 (or 992664 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 57032721648 in words is "fifty-seven billion, thirty-two million, seven hundred twenty-one thousand, six hundred forty-eight".