64625278465 has 32 divisors (see below), whose sum is σ = 86249189376. Its totient is φ = 46090503360.

The previous prime is 64625278429. The next prime is 64625278489. The reversal of 64625278465 is 56487252646.

It is not a de Polignac number, because 64625278465 - 2⁹ = 64625277953 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

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, 782434 + ... + 861076.

It is an arithmetic number, because the mean of its divisors is an integer number (2695287168).

Almost surely, 2^64625278465 is an apocalyptic number.

It is an amenable number.

64625278465 is a deficient number, since it is larger than the sum of its proper divisors (21623910911).

64625278465 is a wasteful number, since it uses less digits than its factorization.

64625278465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78949.

The product of its digits is 19353600, while the sum is 55.

The spelling of 64625278465 in words is "sixty-four billion, six hundred twenty-five million, two hundred seventy-eight thousand, four hundred sixty-five".