640058553456 has 160 divisors (see below), whose sum is σ = 1900122098688. Its totient is φ = 181867315200.

The previous prime is 640058553437. The next prime is 640058553523. The reversal of 640058553456 is 654355850046.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 640058553399 and 640058553408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56382181 + ... + 56393531.

Almost surely, 2^640058553456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640058553456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950061049344).

640058553456 is an abundant number, since it is smaller than the sum of its proper divisors (1260063545232).

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

640058553456 is a wasteful number, since it uses less digits than its factorization.

640058553456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12279 (or 12273 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 51.

The spelling of 640058553456 in words is "six hundred forty billion, fifty-eight million, five hundred fifty-three thousand, four hundred fifty-six".