57978834618 has 16 divisors (see below), whose sum is σ = 115999884000. Its totient is φ = 19319242416.

The previous prime is 57978834607. The next prime is 57978834619. The reversal of 57978834618 is 81643887975.

It is a super-2 number, since 2×57978834618² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57978834619) 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, 1741080 + ... + 1774067.

It is an arithmetic number, because the mean of its divisors is an integer number (7249992750).

Almost surely, 2^57978834618 is an apocalyptic number.

57978834618 is an abundant number, since it is smaller than the sum of its proper divisors (58021049382).

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

57978834618 is a wasteful number, since it uses less digits than its factorization.

57978834618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517901.

The product of its digits is 81285120, while the sum is 66.

The spelling of 57978834618 in words is "fifty-seven billion, nine hundred seventy-eight million, eight hundred thirty-four thousand, six hundred eighteen".