64545163251 has 16 divisors (see below), whose sum is σ = 86196025344. Its totient is φ = 42962249664.

The previous prime is 64545163237. The next prime is 64545163259. The reversal of 64545163251 is 15236154546.

It is not a de Polignac number, because 64545163251 - 2⁶ = 64545163187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64545163259) 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 15 ways as a sum of consecutive naturals, for example, 10134270 + ... + 10140636.

It is an arithmetic number, because the mean of its divisors is an integer number (5387251584).

Almost surely, 2^64545163251 is an apocalyptic number.

64545163251 is a deficient number, since it is larger than the sum of its proper divisors (21650862093).

64545163251 is a wasteful number, since it uses less digits than its factorization.

64545163251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11170.

The product of its digits is 432000, while the sum is 42.

The spelling of 64545163251 in words is "sixty-four billion, five hundred forty-five million, one hundred sixty-three thousand, two hundred fifty-one".