64373447467645 has 4 divisors (see below), whose sum is σ = 77248136961180. Its totient is φ = 51498757974112.

The previous prime is 64373447467619. The next prime is 64373447467663. The reversal of 64373447467645 is 54676474437346.

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 48980583923769 + 15392863543876 = 6998613^2 + 3923374^2 .

It is a cyclic number.

It is not a de Polignac number, because 64373447467645 - 2²⁵ = 64373413913213 is a prime.

It is a congruent 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, 6437344746760 + ... + 6437344746769.

It is an arithmetic number, because the mean of its divisors is an integer number (19312034240295).

Almost surely, 2^{64373447467645} is an apocalyptic number.

It is an amenable number.

64373447467645 is a deficient number, since it is larger than the sum of its proper divisors (12874689493535).

64373447467645 is a wasteful number, since it uses less digits than its factorization.

64373447467645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12874689493534.

The product of its digits is 3413975040, while the sum is 70.

The spelling of 64373447467645 in words is "sixty-four trillion, three hundred seventy-three billion, four hundred forty-seven million, four hundred sixty-seven thousand, six hundred forty-five".