64746864745 has 8 divisors (see below), whose sum is σ = 77778811080. Its totient is φ = 51742442880.

The previous prime is 64746864701. The next prime is 64746864757. The reversal of 64746864745 is 54746864746.

It can be written as a sum of positive squares in 4 ways, for example, as 27065843289 + 37681021456 = 164517^2 + 194116^2 .

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

It is not a de Polignac number, because 64746864745 - 2⁷ = 64746864617 is a prime.

It is an unprimeable number.

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, 6875940 + ... + 6885349.

It is an arithmetic number, because the mean of its divisors is an integer number (9722351385).

Almost surely, 2^64746864745 is an apocalyptic number.

It is an amenable number.

64746864745 is a deficient number, since it is larger than the sum of its proper divisors (13031946335).

64746864745 is a wasteful number, since it uses less digits than its factorization.

64746864745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13762235.

The product of its digits is 108380160, while the sum is 61.

Subtracting from 64746864745 its reverse (54746864746), we obtain a palindrome (9999999999).

The spelling of 64746864745 in words is "sixty-four billion, seven hundred forty-six million, eight hundred sixty-four thousand, seven hundred forty-five".