52820631618 has 64 divisors (see below), whose sum is σ = 108642643200. Its totient is φ = 17115033600.

The previous prime is 52820631613. The next prime is 52820631667. The reversal of 52820631618 is 81613602825.

It is a super-2 number, since 2×52820631618² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52820631618.

It is not an unprimeable number, because it can be changed into a prime (52820631613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11609208 + ... + 11613756.

It is an arithmetic number, because the mean of its divisors is an integer number (1697541300).

Almost surely, 2^52820631618 is an apocalyptic number.

52820631618 is an abundant number, since it is smaller than the sum of its proper divisors (55822011582).

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

52820631618 is a wasteful number, since it uses less digits than its factorization.

52820631618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 52820631618 in words is "fifty-two billion, eight hundred twenty million, six hundred thirty-one thousand, six hundred eighteen".