64615197 has 16 divisors (see below), whose sum is σ = 88545600. Its totient is φ = 41889792.

The previous prime is 64615193. The next prime is 64615231. The reversal of 64615197 is 79151646.

It is not a de Polignac number, because 64615197 - 2² = 64615193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64615193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32179 + ... + 34127.

It is an arithmetic number, because the mean of its divisors is an integer number (5534100).

Almost surely, 2^64615197 is an apocalyptic number.

It is an amenable number.

64615197 is a deficient number, since it is larger than the sum of its proper divisors (23930403).

64615197 is a wasteful number, since it uses less digits than its factorization.

64615197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

The product of its digits is 45360, while the sum is 39.

The square root of 64615197 is about 8038.3578546865. The cubic root of 64615197 is about 401.2775755740.

The spelling of 64615197 in words is "sixty-four million, six hundred fifteen thousand, one hundred ninety-seven".