64261864 has 16 divisors (see below), whose sum is σ = 122765220. Its totient is φ = 31524480.

The previous prime is 64261849. The next prime is 64261867. The reversal of 64261864 is 46816246.

It can be written as a sum of positive squares in 2 ways, for example, as 58644964 + 5616900 = 7658^2 + 2370^2 .

It is not an unprimeable number, because it can be changed into a prime (64261867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75357 + ... + 76204.

Almost surely, 2^64261864 is an apocalyptic number.

It is an amenable number.

64261864 is a deficient number, since it is larger than the sum of its proper divisors (58503356).

64261864 is a wasteful number, since it uses less digits than its factorization.

64261864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151620 (or 151616 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 64261864 is about 8016.3497927673. The cubic root of 64261864 is about 400.5448076247.

The spelling of 64261864 in words is "sixty-four million, two hundred sixty-one thousand, eight hundred sixty-four".