64463631 has 8 divisors (see below), whose sum is σ = 85989120. Its totient is φ = 42956952.

The previous prime is 64463627. The next prime is 64463639. The reversal of 64463631 is 13636446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64463631 - 2² = 64463627 is a prime.

It is a super-2 number, since 2×64463631² = 8311119443408322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64463592 and 64463601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64463639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9016 + ... + 14498.

It is an arithmetic number, because the mean of its divisors is an integer number (10748640).

Almost surely, 2^64463631 is an apocalyptic number.

64463631 is a deficient number, since it is larger than the sum of its proper divisors (21525489).

64463631 is a wasteful number, since it uses less digits than its factorization.

64463631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9405.

The product of its digits is 31104, while the sum is 33.

The square root of 64463631 is about 8028.9246477969. The cubic root of 64463631 is about 400.9635748615.

The spelling of 64463631 in words is "sixty-four million, four hundred sixty-three thousand, six hundred thirty-one".