64813140 has 72 divisors (see below), whose sum is σ = 224689920. Its totient is φ = 14814144.

The previous prime is 64813097. The next prime is 64813153. The reversal of 64813140 is 4131846.

64813140 is a `hidden beast` number, since 648 + 1 + 3 + 14 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24460 + ... + 26979.

Almost surely, 2^64813140 is an apocalyptic number.

64813140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64813140 is an abundant number, since it is smaller than the sum of its proper divisors (159876780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64813140 is a wasteful number, since it uses less digits than its factorization.

64813140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51461 (or 51456 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 64813140 is about 8050.6608424402. The cubic root of 64813140 is about 401.6869174396.

Adding to 64813140 its reverse (4131846), we get a palindrome (68944986).

The spelling of 64813140 in words is "sixty-four million, eight hundred thirteen thousand, one hundred forty".