64628230440664 has 32 divisors (see below), whose sum is σ = 132194424770640. Its totient is φ = 29376397926400.

The previous prime is 64628230440619. The next prime is 64628230440691. The reversal of 64628230440664 is 46604403282646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59094072 + ... + 60177784.

Almost surely, 2^{64628230440664} is an apocalyptic number.

It is an amenable number.

64628230440664 is an abundant number, since it is smaller than the sum of its proper divisors (67566194329976).

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

64628230440664 is a wasteful number, since it uses less digits than its factorization.

64628230440664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761411 (or 1761407 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 55.

The spelling of 64628230440664 in words is "sixty-four trillion, six hundred twenty-eight billion, two hundred thirty million, four hundred forty thousand, six hundred sixty-four".