64595961 has 14 divisors (see below), whose sum is σ = 96850730. Its totient is φ = 43063488.

The previous prime is 64595959. The next prime is 64595977. The reversal of 64595961 is 16959546.

It is a happy number.

64595961 is a `hidden beast` number, since 6 + 4 + 59 + 596 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64304361 + 291600 = 8019^2 + 540^2 .

It is not a de Polignac number, because 64595961 - 2¹ = 64595959 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (64594961) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 43576 + ... + 45033.

Almost surely, 2^64595961 is an apocalyptic number.

It is an amenable number.

64595961 is a deficient number, since it is larger than the sum of its proper divisors (32254769).

64595961 is an frugal number, since it uses more digits than its factorization.

64595961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88627 (or 88612 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 64595961 is about 8037.1612525817. The cubic root of 64595961 is about 401.2377513948.

Subtracting from 64595961 its product of digits (291600), we obtain a square (64304361 = 8019²).

It can be divided in two parts, 64595 and 961, that added together give a palindrome (65556).

The spelling of 64595961 in words is "sixty-four million, five hundred ninety-five thousand, nine hundred sixty-one".