64981413 has 16 divisors (see below), whose sum is σ = 110021760. Its totient is φ = 37132128.

The previous prime is 64981393. The next prime is 64981451. The reversal of 64981413 is 31418946.

64981413 is a `hidden beast` number, since 649 + 8 + 1 + 4 + 1 + 3 = 666.

It is not a de Polignac number, because 64981413 - 2⁹ = 64980901 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64981013) 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, 171720 + ... + 172097.

It is an arithmetic number, because the mean of its divisors is an integer number (6876360).

Almost surely, 2^64981413 is an apocalyptic number.

64981413 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

64981413 is a deficient number, since it is larger than the sum of its proper divisors (45040347).

64981413 is a wasteful number, since it uses less digits than its factorization.

64981413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343833 (or 343827 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 64981413 is about 8061.1049490749. The cubic root of 64981413 is about 402.0342474721.

The spelling of 64981413 in words is "sixty-four million, nine hundred eighty-one thousand, four hundred thirteen".