53644307664 has 40 divisors (see below), whose sum is σ = 138596268160. Its totient is φ = 17879482368.

The previous prime is 53644307657. The next prime is 53644307671. The reversal of 53644307664 is 46670344635.

It is an interprime number because it is at equal distance from previous prime (53644307657) and next prime (53644307671).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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, 422352 + ... + 534480.

It is an arithmetic number, because the mean of its divisors is an integer number (3464906704).

Almost surely, 2^53644307664 is an apocalyptic number.

It is an amenable number.

53644307664 is an abundant number, since it is smaller than the sum of its proper divisors (84951960496).

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

53644307664 is a wasteful number, since it uses less digits than its factorization.

53644307664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122107 (or 122101 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 48.

The spelling of 53644307664 in words is "fifty-three billion, six hundred forty-four million, three hundred seven thousand, six hundred sixty-four".