64431325465 has 8 divisors (see below), whose sum is σ = 83265097608. Its totient is φ = 47580055680.

The previous prime is 64431325433. The next prime is 64431325559. The reversal of 64431325465 is 56452313446.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 448634761 + 63982690704 = 21181^2 + 252948^2 .

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

It is not a de Polignac number, because 64431325465 - 2⁵ = 64431325433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495625516 + ... + 495625645.

It is an arithmetic number, because the mean of its divisors is an integer number (10408137201).

Almost surely, 2^64431325465 is an apocalyptic number.

64431325465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64431325465 is a deficient number, since it is larger than the sum of its proper divisors (18833772143).

64431325465 is a wasteful number, since it uses less digits than its factorization.

64431325465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991251179.

The product of its digits is 1036800, while the sum is 43.

The spelling of 64431325465 in words is "sixty-four billion, four hundred thirty-one million, three hundred twenty-five thousand, four hundred sixty-five".