64632402305 has 4 divisors (see below), whose sum is σ = 77558882772. Its totient is φ = 51705921840.

The previous prime is 64632402257. The next prime is 64632402313. The reversal of 64632402305 is 50320423646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15904488769 + 48727913536 = 126113^2 + 220744^2 .

It is not a de Polignac number, because 64632402305 - 2²⁴ = 64615625089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6463240226 + ... + 6463240235.

It is an arithmetic number, because the mean of its divisors is an integer number (19389720693).

Almost surely, 2^64632402305 is an apocalyptic number.

It is an amenable number.

64632402305 is a deficient number, since it is larger than the sum of its proper divisors (12926480467).

64632402305 is a wasteful number, since it uses less digits than its factorization.

64632402305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926480466.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 64632402305 in words is "sixty-four billion, six hundred thirty-two million, four hundred two thousand, three hundred five".