64853756406 has 32 divisors (see below), whose sum is σ = 146093706720. Its totient is φ = 21321781632.

The previous prime is 64853756347. The next prime is 64853756431. The reversal of 64853756406 is 60465735846.

64853756406 is a `hidden beast` number, since 6 + 48 + 5 + 37 + 564 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8222055 + ... + 8229938.

It is an arithmetic number, because the mean of its divisors is an integer number (4565428335).

Almost surely, 2^64853756406 is an apocalyptic number.

64853756406 is an abundant number, since it is smaller than the sum of its proper divisors (81239950314).

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

64853756406 is a wasteful number, since it uses less digits than its factorization.

64853756406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16452077 (or 16452071 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 54.

The spelling of 64853756406 in words is "sixty-four billion, eight hundred fifty-three million, seven hundred fifty-six thousand, four hundred six".