64815072 has 48 divisors (see below), whose sum is σ = 194447232. Its totient is φ = 18518400.

The previous prime is 64815059. The next prime is 64815103. The reversal of 64815072 is 27051846.

It is a tau number, because it is divible by the number of its divisors (48).

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, 47554 + ... + 48897.

It is an arithmetic number, because the mean of its divisors is an integer number (4050984).

Almost surely, 2^64815072 is an apocalyptic number.

It is an amenable number.

64815072 is an abundant number, since it is smaller than the sum of its proper divisors (129632160).

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

64815072 is a wasteful number, since it uses less digits than its factorization.

64815072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96471 (or 96463 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 64815072 is about 8050.7808316958. The cubic root of 64815072 is about 401.6909086643.

The spelling of 64815072 in words is "sixty-four million, eight hundred fifteen thousand, seventy-two".