64653244235646 has 48 divisors (see below), whose sum is σ = 143537503035024. Its totient is φ = 19397913040000.

The previous prime is 64653244235623. The next prime is 64653244235647.

64653244235646 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 64653244235646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64653244235647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440788335 + ... + 440934986.

It is an arithmetic number, because the mean of its divisors is an integer number (2990364646563).

Almost surely, 2^{64653244235646} is an apocalyptic number.

64653244235646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64653244235646 is an abundant number, since it is smaller than the sum of its proper divisors (78884258799378).

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

64653244235646 is a wasteful number, since it uses less digits than its factorization.

64653244235646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881723449 (or 881723438 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 60.

The spelling of 64653244235646 in words is "sixty-four trillion, six hundred fifty-three billion, two hundred forty-four million, two hundred thirty-five thousand, six hundred forty-six".