64812785 has 24 divisors (see below), whose sum is σ = 82526976. Its totient is φ = 48803040.

The previous prime is 64812773. The next prime is 64812793. The reversal of 64812785 is 58721846.

It is a de Polignac number, because none of the positive numbers 2^k-64812785 is a prime.

It is a Duffinian number.

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, 820376 + ... + 820454.

It is an arithmetic number, because the mean of its divisors is an integer number (3438624).

Almost surely, 2^64812785 is an apocalyptic number.

It is an amenable number.

64812785 is a deficient number, since it is larger than the sum of its proper divisors (17714191).

64812785 is an equidigital number, since it uses as much as digits as its factorization.

64812785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 182 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 64812785 is about 8050.6387945305. The cubic root of 64812785 is about 401.6861840538.

The spelling of 64812785 in words is "sixty-four million, eight hundred twelve thousand, seven hundred eighty-five".