64197377746 has 8 divisors (see below), whose sum is σ = 101960541180. Its totient is φ = 30210530688.

The previous prime is 64197377737. The next prime is 64197377767. The reversal of 64197377746 is 64777379146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62242765225 + 1954612521 = 249485^2 + 44211^2 .

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

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, 944079051 + ... + 944079118.

Almost surely, 2^64197377746 is an apocalyptic number.

64197377746 is a deficient number, since it is larger than the sum of its proper divisors (37763163434).

64197377746 is a wasteful number, since it uses less digits than its factorization.

64197377746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888158188.

The product of its digits is 37340352, while the sum is 61.

The spelling of 64197377746 in words is "sixty-four billion, one hundred ninety-seven million, three hundred seventy-seven thousand, seven hundred forty-six".