64279261 has 16 divisors (see below), whose sum is σ = 72878400. Its totient is φ = 56325888.

The previous prime is 64279253. The next prime is 64279277. The reversal of 64279261 is 16297246.

It is a cyclic number.

It is not a de Polignac number, because 64279261 - 2³ = 64279253 is a prime.

It is a super-2 number, since 2×64279261² = 8263646789412242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64279261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64279231) 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, 17371 + ... + 20743.

It is an arithmetic number, because the mean of its divisors is an integer number (4554900).

Almost surely, 2^64279261 is an apocalyptic number.

It is an amenable number.

64279261 is a deficient number, since it is larger than the sum of its proper divisors (8599139).

64279261 is a wasteful number, since it uses less digits than its factorization.

64279261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468.

The product of its digits is 36288, while the sum is 37.

The square root of 64279261 is about 8017.4348142034. The cubic root of 64279261 is about 400.5809495855.

The spelling of 64279261 in words is "sixty-four million, two hundred seventy-nine thousand, two hundred sixty-one".