57721073373 has 6 divisors (see below), whose sum is σ = 83374883774. Its totient is φ = 38480715576.

The previous prime is 57721073359. The next prime is 57721073429. The reversal of 57721073373 is 37337012775.

57721073373 is a `hidden beast` number, since 577 + 2 + 1 + 0 + 7 + 3 + 3 + 73 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54232162884 + 3488910489 = 232878^2 + 59067^2 .

It is not a de Polignac number, because 57721073373 - 2³⁰ = 56647331549 is a prime.

It is a super-2 number, since 2×57721073373² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57721073303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3206726290 + ... + 3206726307.

Almost surely, 2^57721073373 is an apocalyptic number.

It is an amenable number.

57721073373 is a deficient number, since it is larger than the sum of its proper divisors (25653810401).

57721073373 is a wasteful number, since it uses less digits than its factorization.

57721073373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6413452603 (or 6413452600 counting only the distinct ones).

The product of its (nonzero) digits is 648270, while the sum is 45.

The spelling of 57721073373 in words is "fifty-seven billion, seven hundred twenty-one million, seventy-three thousand, three hundred seventy-three".