64774925 has 6 divisors (see below), whose sum is σ = 80320938. Its totient is φ = 51819920.

The previous prime is 64774921. The next prime is 64774937. The reversal of 64774925 is 52947746.

It can be written as a sum of positive squares in 3 ways, for example, as 21557449 + 43217476 = 4643^2 + 6574^2 .

It is not a de Polignac number, because 64774925 - 2² = 64774921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64774921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1295474 + ... + 1295523.

It is an arithmetic number, because the mean of its divisors is an integer number (13386823).

Almost surely, 2^64774925 is an apocalyptic number.

It is an amenable number.

64774925 is a deficient number, since it is larger than the sum of its proper divisors (15546013).

64774925 is a wasteful number, since it uses less digits than its factorization.

64774925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591007 (or 2591002 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The square root of 64774925 is about 8048.2870848399. The cubic root of 64774925 is about 401.6079546269.

The spelling of 64774925 in words is "sixty-four million, seven hundred seventy-four thousand, nine hundred twenty-five".