64714581 has 12 divisors (see below), whose sum is σ = 93812940. Its totient is φ = 42987840.

The previous prime is 64714579. The next prime is 64714609. The reversal of 64714581 is 18541746.

It is a happy number.

64714581 is a `hidden beast` number, since 6 + 4 + 71 + 4 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51969681 + 12744900 = 7209^2 + 3570^2 .

It is not a de Polignac number, because 64714581 - 2¹ = 64714579 is a prime.

It is a super-2 number, since 2×64714581² = 8375953988011122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64714511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10266 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (7817745).

Almost surely, 2^64714581 is an apocalyptic number.

It is an amenable number.

64714581 is a deficient number, since it is larger than the sum of its proper divisors (29098359).

64714581 is a wasteful number, since it uses less digits than its factorization.

64714581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25876 (or 25873 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 64714581 is about 8044.5373390892. The cubic root of 64714581 is about 401.4832038846.

The spelling of 64714581 in words is "sixty-four million, seven hundred fourteen thousand, five hundred eighty-one".