64362681 has 14 divisors (see below), whose sum is σ = 96500970. Its totient is φ = 42907968.

The previous prime is 64362673. The next prime is 64362689. The reversal of 64362681 is 18626346.

64362681 is a `hidden beast` number, since 643 + 6 + 2 + 6 + 8 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (64362673) and next prime (64362689).

It can be written as a sum of positive squares in only one way, i.e., 62157456 + 2205225 = 7884^2 + 1485^2 .

It is not a de Polignac number, because 64362681 - 2³ = 64362673 is a prime.

It is a super-2 number, since 2×64362681² = 8285109411015522, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (64362689) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 43416 + ... + 44873.

Almost surely, 2^64362681 is an apocalyptic number.

It is an amenable number.

64362681 is a deficient number, since it is larger than the sum of its proper divisors (32138289).

64362681 is an frugal number, since it uses more digits than its factorization.

64362681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88307 (or 88292 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 64362681 is about 8022.6355395219. The cubic root of 64362681 is about 400.7541626199.

The spelling of 64362681 in words is "sixty-four million, three hundred sixty-two thousand, six hundred eighty-one".