64918131 has 8 divisors (see below), whose sum is σ = 86887680. Its totient is φ = 43113672.

The previous prime is 64918127. The next prime is 64918151. The reversal of 64918131 is 13181946.

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

It is not a de Polignac number, because 64918131 - 2² = 64918127 is a prime.

It is a super-2 number, since 2×64918131² = 8428727465066322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64918092 and 64918101.

It is not an unprimeable number, because it can be changed into a prime (64918151) 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, 40351 + ... + 41928.

It is an arithmetic number, because the mean of its divisors is an integer number (10860960).

Almost surely, 2^64918131 is an apocalyptic number.

64918131 is a deficient number, since it is larger than the sum of its proper divisors (21969549).

64918131 is a wasteful number, since it uses less digits than its factorization.

64918131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82545.

The product of its digits is 5184, while the sum is 33.

The square root of 64918131 is about 8057.1788487038. The cubic root of 64918131 is about 401.9036983747.

The spelling of 64918131 in words is "sixty-four million, nine hundred eighteen thousand, one hundred thirty-one".