64120715 has 8 divisors (see below), whose sum is σ = 77239008. Its totient is φ = 51100480.

The previous prime is 64120691. The next prime is 64120717. The reversal of 64120715 is 51702146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-64120715 is a prime.

It is a super-2 number, since 2×64120715² = 8222932184222450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64120717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23066 + ... + 25695.

It is an arithmetic number, because the mean of its divisors is an integer number (9654876).

Almost surely, 2^64120715 is an apocalyptic number.

64120715 is a deficient number, since it is larger than the sum of its proper divisors (13118293).

64120715 is a wasteful number, since it uses less digits than its factorization.

64120715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49029.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 64120715 is about 8007.5411332069. The cubic root of 64120715 is about 400.2513316313.

The spelling of 64120715 in words is "sixty-four million, one hundred twenty thousand, seven hundred fifteen".