57587957981 has 8 divisors (see below), whose sum is σ = 59021874744. Its totient is φ = 56155438080.

The previous prime is 57587957941. The next prime is 57587957993. The reversal of 57587957981 is 18975978575.

It can be written as a sum of positive squares in 4 ways, for example, as 14625032356 + 42962925625 = 120934^2 + 207275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57587957981 - 2³⁴ = 40408088797 is a prime.

It is a super-2 number, since 2×57587957981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57587957941) 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, 265490 + ... + 430883.

It is an arithmetic number, because the mean of its divisors is an integer number (7377734343).

Almost surely, 2^57587957981 is an apocalyptic number.

It is an amenable number.

57587957981 is a deficient number, since it is larger than the sum of its proper divisors (1433916763).

57587957981 is a wasteful number, since it uses less digits than its factorization.

57587957981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698431.

The product of its digits is 222264000, while the sum is 71.

The spelling of 57587957981 in words is "fifty-seven billion, five hundred eighty-seven million, nine hundred fifty-seven thousand, nine hundred eighty-one".