64904480776680 has 128 divisors (see below), whose sum is σ = 202046850662400. Its totient is φ = 16661849299200.

The previous prime is 64904480776673. The next prime is 64904480776717. The reversal of 64904480776680 is 8667708440946.

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, 44963410 + ... + 46384449.

It is an arithmetic number, because the mean of its divisors is an integer number (1578491020800).

Almost surely, 2^{64904480776680} is an apocalyptic number.

64904480776680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64904480776680 is an abundant number, since it is smaller than the sum of its proper divisors (137142369885720).

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

64904480776680 is a wasteful number, since it uses less digits than its factorization.

64904480776680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91348095 (or 91348091 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 69.

The spelling of 64904480776680 in words is "sixty-four trillion, nine hundred four billion, four hundred eighty million, seven hundred seventy-six thousand, six hundred eighty".