64884261 has 16 divisors (see below), whose sum is σ = 93998016. Its totient is φ = 39572736.

The previous prime is 64884251. The next prime is 64884277. The reversal of 64884261 is 16248846.

It is not a de Polignac number, because 64884261 - 2⁵ = 64884229 is a prime.

It is a super-2 number, since 2×64884261² = 8419934651032242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64884251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2955 + ... + 11768.

It is an arithmetic number, because the mean of its divisors is an integer number (5874876).

Almost surely, 2^64884261 is an apocalyptic number.

It is an amenable number.

64884261 is a deficient number, since it is larger than the sum of its proper divisors (29113755).

64884261 is a wasteful number, since it uses less digits than its factorization.

64884261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14852.

The product of its digits is 73728, while the sum is 39.

The square root of 64884261 is about 8055.0767221672. The cubic root of 64884261 is about 401.8337905996.

The spelling of 64884261 in words is "sixty-four million, eight hundred eighty-four thousand, two hundred sixty-one".