664195602280 has 128 divisors (see below), whose sum is σ = 1712534503680. Its totient is φ = 227111454720.

The previous prime is 664195602269. The next prime is 664195602307. The reversal of 664195602280 is 82206591466.

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, 194605854 + ... + 194609266.

It is an arithmetic number, because the mean of its divisors is an integer number (13379175810).

Almost surely, 2^664195602280 is an apocalyptic number.

It is an amenable number.

664195602280 is an abundant number, since it is smaller than the sum of its proper divisors (1048338901400).

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

664195602280 is a wasteful number, since it uses less digits than its factorization.

664195602280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5099 (or 5095 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 664195602280 in words is "six hundred sixty-four billion, one hundred ninety-five million, six hundred two thousand, two hundred eighty".