64634744451 has 8 divisors (see below), whose sum is σ = 86212400400. Its totient is φ = 43073459072.

The previous prime is 64634744309. The next prime is 64634744479. The reversal of 64634744451 is 15444743646.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64634744451 is a prime.

It is a super-4 number, since 4×64634744451⁴ (a number of 44 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64634744451.

It is not an unprimeable number, because it can be changed into a prime (64634744051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4083426 + ... + 4099223.

It is an arithmetic number, because the mean of its divisors is an integer number (10776550050).

Almost surely, 2^64634744451 is an apocalyptic number.

64634744451 is a deficient number, since it is larger than the sum of its proper divisors (21577655949).

64634744451 is a wasteful number, since it uses less digits than its factorization.

64634744451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185285.

The product of its digits is 3870720, while the sum is 48.

The spelling of 64634744451 in words is "sixty-four billion, six hundred thirty-four million, seven hundred forty-four thousand, four hundred fifty-one".