52644368618 has 4 divisors (see below), whose sum is σ = 78966552930. Its totient is φ = 26322184308.

The previous prime is 52644368611. The next prime is 52644368633. The reversal of 52644368618 is 81686344625.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45171976369 + 7472392249 = 212537^2 + 86443^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 52644368618.

It is not an unprimeable number, because it can be changed into a prime (52644368611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13161092153 + ... + 13161092156.

Almost surely, 2^52644368618 is an apocalyptic number.

52644368618 is a deficient number, since it is larger than the sum of its proper divisors (26322184312).

52644368618 is a wasteful number, since it uses less digits than its factorization.

52644368618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26322184311.

The product of its digits is 6635520, while the sum is 53.

The spelling of 52644368618 in words is "fifty-two billion, six hundred forty-four million, three hundred sixty-eight thousand, six hundred eighteen".