640675203560448 has 176 divisors, whose sum is σ = 1969819645791744. Its totient is φ = 181339309301760.

The previous prime is 640675203560429. The next prime is 640675203560461. The reversal of 640675203560448 is 844065302576046.

It is a junction number, because it is equal to n+sod(n) for n = 640675203560391 and 640675203560400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136920118 + ... + 141521973.

Almost surely, 2^{640675203560448} is an apocalyptic number.

It is an amenable number.

640675203560448 is an abundant number, since it is smaller than the sum of its proper divisors (1329144442231296).

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

640675203560448 is a wasteful number, since it uses less digits than its factorization.

640675203560448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278442228 (or 278442210 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 60.

The spelling of 640675203560448 in words is "six hundred forty trillion, six hundred seventy-five billion, two hundred three million, five hundred sixty thousand, four hundred forty-eight".