64542315 has 16 divisors (see below), whose sum is σ = 103572000. Its totient is φ = 34321152.

The previous prime is 64542311. The next prime is 64542329. The reversal of 64542315 is 51324546.

It is not a de Polignac number, because 64542315 - 2² = 64542311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64542311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (6473250).

Almost surely, 2^64542315 is an apocalyptic number.

64542315 is a deficient number, since it is larger than the sum of its proper divisors (39029685).

64542315 is a wasteful number, since it uses less digits than its factorization.

64542315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12686.

The product of its digits is 14400, while the sum is 30.

The square root of 64542315 is about 8033.8231870013. The cubic root of 64542315 is about 401.1266466059.

The spelling of 64542315 in words is "sixty-four million, five hundred forty-two thousand, three hundred fifteen".