64276631 has 4 divisors (see below), whose sum is σ = 64303272. Its totient is φ = 64249992.

The previous prime is 64276607. The next prime is 64276633. The reversal of 64276631 is 13667246.

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

It is a cyclic number.

It is not a de Polignac number, because 64276631 - 2⁶ = 64276567 is a prime.

It is a super-2 number, since 2×64276631² = 8262970585420322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64276591 and 64276600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64276633) 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, 9296 + ... + 14661.

It is an arithmetic number, because the mean of its divisors is an integer number (16075818).

Almost surely, 2^64276631 is an apocalyptic number.

64276631 is a deficient number, since it is larger than the sum of its proper divisors (26641).

64276631 is a wasteful number, since it uses less digits than its factorization.

64276631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26640.

The product of its digits is 36288, while the sum is 35.

The square root of 64276631 is about 8017.2707949776. The cubic root of 64276631 is about 400.5754862253.

The spelling of 64276631 in words is "sixty-four million, two hundred seventy-six thousand, six hundred thirty-one".