64456812 has 144 divisors (see below), whose sum is σ = 198295552. Its totient is φ = 17262720.

The previous prime is 64456801. The next prime is 64456841. The reversal of 64456812 is 21865446.

64456812 is a `hidden beast` number, since 644 + 5 + 6 + 8 + 1 + 2 = 666.

It is a super-2 number, since 2×64456812² = 8309361226406688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288933 + ... + 289155.

Almost surely, 2^64456812 is an apocalyptic number.

64456812 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a pronic number, being equal to 8028×8029.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64456812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99147776).

64456812 is an abundant number, since it is smaller than the sum of its proper divisors (133838740).

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

64456812 is a wasteful number, since it uses less digits than its factorization.

64456812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 303 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 64456812 is about 8028.4999844305. The cubic root of 64456812 is about 400.9494363104.

The spelling of 64456812 in words is "sixty-four million, four hundred fifty-six thousand, eight hundred twelve".