64612685 has 4 divisors (see below), whose sum is σ = 77535228. Its totient is φ = 51690144.

The previous prime is 64612663. The next prime is 64612697. The reversal of 64612685 is 58621646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48636676 + 15976009 = 6974^2 + 3997^2 .

It is a cyclic number.

It is not a de Polignac number, because 64612685 - 2¹⁶ = 64547149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6461264 + ... + 6461273.

It is an arithmetic number, because the mean of its divisors is an integer number (19383807).

Almost surely, 2^64612685 is an apocalyptic number.

It is an amenable number.

64612685 is a deficient number, since it is larger than the sum of its proper divisors (12922543).

64612685 is a wasteful number, since it uses less digits than its factorization.

64612685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922542.

The product of its digits is 69120, while the sum is 38.

The square root of 64612685 is about 8038.2016023486. The cubic root of 64612685 is about 401.2723754437.

It can be divided in two parts, 646 and 12685, that added together give a palindrome (13331).

The spelling of 64612685 in words is "sixty-four million, six hundred twelve thousand, six hundred eighty-five".