64502816 has 72 divisors (see below), whose sum is σ = 152603136. Its totient is φ = 26732160.

The previous prime is 64502807. The next prime is 64502827. The reversal of 64502816 is 61820546.

It is a super-2 number, since 2×64502816² = 8321226543859712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47945 + ... + 49271.

It is an arithmetic number, because the mean of its divisors is an integer number (2119488).

Almost surely, 2^64502816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64502816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76301568).

64502816 is an abundant number, since it is smaller than the sum of its proper divisors (88100320).

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

64502816 is a wasteful number, since it uses less digits than its factorization.

64502816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 64502816 is about 8031.3645166933. The cubic root of 64502816 is about 401.0448019296.

The spelling of 64502816 in words is "sixty-four million, five hundred two thousand, eight hundred sixteen".