64699992785 has 8 divisors (see below), whose sum is σ = 79445572800. Its totient is φ = 50556273264.

The previous prime is 64699992769. The next prime is 64699992787. The reversal of 64699992785 is 58729999646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64699992785 - 2⁴ = 64699992769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64699992787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150464885 + ... + 150465314.

It is an arithmetic number, because the mean of its divisors is an integer number (9930696600).

Almost surely, 2^64699992785 is an apocalyptic number.

It is an amenable number.

64699992785 is a deficient number, since it is larger than the sum of its proper divisors (14745580015).

64699992785 is a wasteful number, since it uses less digits than its factorization.

64699992785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300930247.

The product of its digits is 529079040, while the sum is 74.

The spelling of 64699992785 in words is "sixty-four billion, six hundred ninety-nine million, nine hundred ninety-two thousand, seven hundred eighty-five".