64899856 has 40 divisors (see below), whose sum is σ = 146776320. Its totient is φ = 27220224.

The previous prime is 64899827. The next prime is 64899869. The reversal of 64899856 is 65899846.

64899856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64899797 and 64899806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901 + ... + 11428.

It is an arithmetic number, because the mean of its divisors is an integer number (3669408).

Almost surely, 2^64899856 is an apocalyptic number.

It is an amenable number.

64899856 is an abundant number, since it is smaller than the sum of its proper divisors (81876464).

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

64899856 is a wasteful number, since it uses less digits than its factorization.

64899856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12391 (or 12385 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The square root of 64899856 is about 8056.0446870657. The cubic root of 64899856 is about 401.8659817446.

The spelling of 64899856 in words is "sixty-four million, eight hundred ninety-nine thousand, eight hundred fifty-six".