64718953 has 16 divisors (see below), whose sum is σ = 72205056. Its totient is φ = 57628800.

The previous prime is 64718911. The next prime is 64718993. The reversal of 64718953 is 35981746.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64718953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64718993) 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, 43878 + ... + 45328.

It is an arithmetic number, because the mean of its divisors is an integer number (4512816).

Almost surely, 2^64718953 is an apocalyptic number.

It is an amenable number.

64718953 is a deficient number, since it is larger than the sum of its proper divisors (7486103).

64718953 is a wasteful number, since it uses less digits than its factorization.

64718953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584.

The product of its digits is 181440, while the sum is 43.

The square root of 64718953 is about 8044.8090716934. The cubic root of 64718953 is about 401.4922448406.

It can be divided in two parts, 647 and 18953, that added together give a square (19600 = 140²).

The spelling of 64718953 in words is "sixty-four million, seven hundred eighteen thousand, nine hundred fifty-three".