64772515 has 16 divisors (see below), whose sum is σ = 80650080. Its totient is φ = 49880320.

The previous prime is 64772503. The next prime is 64772549. The reversal of 64772515 is 51527746.

It is not a de Polignac number, because 64772515 - 2⁵ = 64772483 is a prime.

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, 84735 + ... + 85495.

It is an arithmetic number, because the mean of its divisors is an integer number (5040630).

Almost surely, 2^64772515 is an apocalyptic number.

64772515 is a deficient number, since it is larger than the sum of its proper divisors (15877565).

64772515 is a wasteful number, since it uses less digits than its factorization.

64772515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382.

The product of its digits is 58800, while the sum is 37.

The square root of 64772515 is about 8048.1373621478. The cubic root of 64772515 is about 401.6029738560.

The spelling of 64772515 in words is "sixty-four million, seven hundred seventy-two thousand, five hundred fifteen".