64614981 has 16 divisors (see below), whose sum is σ = 90435456. Its totient is φ = 40958016.

The previous prime is 64614973. The next prime is 64614983. The reversal of 64614981 is 18941646.

It is not a de Polignac number, because 64614981 - 2³ = 64614973 is a prime.

It is a super-2 number, since 2×64614981² = 8350191539260722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64614983) 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, 9231 + ... + 14643.

It is an arithmetic number, because the mean of its divisors is an integer number (5652216).

Almost surely, 2^64614981 is an apocalyptic number.

It is an amenable number.

64614981 is a deficient number, since it is larger than the sum of its proper divisors (25820475).

64614981 is a wasteful number, since it uses less digits than its factorization.

64614981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612.

The product of its digits is 41472, while the sum is 39.

The square root of 64614981 is about 8038.3444190953. The cubic root of 64614981 is about 401.2771284343.

The spelling of 64614981 in words is "sixty-four million, six hundred fourteen thousand, nine hundred eighty-one".