64836440852 has 48 divisors (see below), whose sum is σ = 118433323008. Its totient is φ = 31022300160.

The previous prime is 64836440849. The next prime is 64836440863. The reversal of 64836440852 is 25804463846.

It is a self number, because there is not a number n which added to its sum of digits gives 64836440852.

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, 27506858 + ... + 27509214.

It is an arithmetic number, because the mean of its divisors is an integer number (2467360896).

Almost surely, 2^64836440852 is an apocalyptic number.

64836440852 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

64836440852 is a deficient number, since it is larger than the sum of its proper divisors (53596882156).

64836440852 is a wasteful number, since it uses less digits than its factorization.

64836440852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 50.

The spelling of 64836440852 in words is "sixty-four billion, eight hundred thirty-six million, four hundred forty thousand, eight hundred fifty-two".