64625534615 has 24 divisors (see below), whose sum is σ = 80318129760. Its totient is φ = 49917072960.

The previous prime is 64625534599. The next prime is 64625534621. The reversal of 64625534615 is 51643552646.

It is not a de Polignac number, because 64625534615 - 2⁴ = 64625534599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64625534615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2094077 + ... + 2124713.

It is an arithmetic number, because the mean of its divisors is an integer number (3346588740).

Almost surely, 2^64625534615 is an apocalyptic number.

64625534615 is a deficient number, since it is larger than the sum of its proper divisors (15692595145).

64625534615 is a wasteful number, since it uses less digits than its factorization.

64625534615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31143 (or 31112 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 47.

The spelling of 64625534615 in words is "sixty-four billion, six hundred twenty-five million, five hundred thirty-four thousand, six hundred fifteen".