57123261636 has 24 divisors (see below), whose sum is σ = 152328697920. Its totient is φ = 16320931872.

The previous prime is 57123261631. The next prime is 57123261641. The reversal of 57123261636 is 63616232175.

It is an interprime number because it is at equal distance from previous prime (57123261631) and next prime (57123261641).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (57123261631) 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 7 ways as a sum of consecutive naturals, for example, 340019331 + ... + 340019498.

It is an arithmetic number, because the mean of its divisors is an integer number (6347029080).

Almost surely, 2^57123261636 is an apocalyptic number.

It is an amenable number.

57123261636 is an abundant number, since it is smaller than the sum of its proper divisors (95205436284).

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

57123261636 is a wasteful number, since it uses less digits than its factorization.

57123261636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680038843 (or 680038841 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The spelling of 57123261636 in words is "fifty-seven billion, one hundred twenty-three million, two hundred sixty-one thousand, six hundred thirty-six".