64375631 has 6 divisors (see below), whose sum is σ = 64685880. Its totient is φ = 64066776.

The previous prime is 64375613. The next prime is 64375657. The reversal of 64375631 is 13657346.

It is not a de Polignac number, because 64375631 - 2⁶ = 64375567 is a prime.

It is a super-2 number, since 2×64375631² = 8288443733296322, 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 = 64375591 and 64375600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64375681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76310 + ... + 77148.

It is an arithmetic number, because the mean of its divisors is an integer number (10780980).

Almost surely, 2^64375631 is an apocalyptic number.

64375631 is a deficient number, since it is larger than the sum of its proper divisors (310249).

64375631 is an frugal number, since it uses more digits than its factorization.

64375631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1116 counting only the distinct ones).

The product of its digits is 45360, while the sum is 35.

The square root of 64375631 is about 8023.4425903100. The cubic root of 64375631 is about 400.7810385377.

The spelling of 64375631 in words is "sixty-four million, three hundred seventy-five thousand, six hundred thirty-one".