64668735315 has 32 divisors (see below), whose sum is σ = 114984322560. Its totient is φ = 34484687712.

The previous prime is 64668735259. The next prime is 64668735343. The reversal of 64668735315 is 51353786646.

64668735315 is a `hidden beast` number, since 6 + 46 + 68 + 7 + 3 + 531 + 5 = 666.

It is not a de Polignac number, because 64668735315 - 2¹² = 64668731219 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 939712 + ... + 1006178.

It is an arithmetic number, because the mean of its divisors is an integer number (3593260080).

Almost surely, 2^64668735315 is an apocalyptic number.

64668735315 is a deficient number, since it is larger than the sum of its proper divisors (50315587245).

64668735315 is a wasteful number, since it uses less digits than its factorization.

64668735315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73688 (or 73682 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 64668735315 in words is "sixty-four billion, six hundred sixty-eight million, seven hundred thirty-five thousand, three hundred fifteen".