640063553630144 has 84 divisors (see below), whose sum is σ = 1525154728582080. Its totient is φ = 265464146626560.

The previous prime is 640063553630101. The next prime is 640063553630191. The reversal of 640063553630144 is 441036355360046.

It is a junction number, because it is equal to n+sod(n) for n = 640063553630092 and 640063553630101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3291868889 + ... + 3292063320.

Almost surely, 2^{640063553630144} is an apocalyptic number.

640063553630144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

640063553630144 is an abundant number, since it is smaller than the sum of its proper divisors (885091174951936).

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

640063553630144 is a wasteful number, since it uses less digits than its factorization.

640063553630144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6583932266 (or 6583932249 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 50.

The spelling of 640063553630144 in words is "six hundred forty trillion, sixty-three billion, five hundred fifty-three million, six hundred thirty thousand, one hundred forty-four".