64674120064 has 32 divisors (see below), whose sum is σ = 135624187800. Its totient is φ = 30635108352.

The previous prime is 64674120061. The next prime is 64674120139. The reversal of 64674120064 is 46002147646.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 64674119999 and 64674120026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64674120061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13294057 + ... + 13298920.

Almost surely, 2^64674120064 is an apocalyptic number.

64674120064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64674120064 is an abundant number, since it is smaller than the sum of its proper divisors (70950067736).

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

64674120064 is a wasteful number, since it uses less digits than its factorization.

64674120064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26593010 (or 26592998 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 64674120064 in words is "sixty-four billion, six hundred seventy-four million, one hundred twenty thousand, sixty-four".