57251987361561 has 48 divisors (see below), whose sum is σ = 80109398264000. Its totient is φ = 36366706861056.

The previous prime is 57251987361511. The next prime is 57251987361571. The reversal of 57251987361561 is 16516378915275.

It is not a de Polignac number, because 57251987361561 - 2¹⁰ = 57251987360537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57251987361492 and 57251987361501.

It is not an unprimeable number, because it can be changed into a prime (57251987361511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1369349025 + ... + 1369390833.

Almost surely, 2^{57251987361561} is an apocalyptic number.

It is an amenable number.

57251987361561 is a deficient number, since it is larger than the sum of its proper divisors (22857410902439).

57251987361561 is a wasteful number, since it uses less digits than its factorization.

57251987361561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45190 (or 45167 counting only the distinct ones).

The product of its digits is 95256000, while the sum is 66.

The spelling of 57251987361561 in words is "fifty-seven trillion, two hundred fifty-one billion, nine hundred eighty-seven million, three hundred sixty-one thousand, five hundred sixty-one".