64327669641 has 15 divisors (see below), whose sum is σ = 96097830103. Its totient is φ = 42883591320.

The previous prime is 64327669633. The next prime is 64327669661. The reversal of 64327669641 is 14696672346.

It is a happy number.

The square root of 64327669641 is 253629.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 58747579641 + 5580090000 = 242379^2 + 74700^2 .

It is not a de Polignac number, because 64327669641 - 2³ = 64327669633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64327669661) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2268571 + ... + 2296751.

Almost surely, 2^64327669641 is an apocalyptic number.

64327669641 is the 253629-th square number.

64327669641 is the 126815-th centered octagonal number.

It is an amenable number.

64327669641 is a deficient number, since it is larger than the sum of its proper divisors (31770160462).

64327669641 is an frugal number, since it uses more digits than its factorization.

64327669641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56374 (or 28184 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The spelling of 64327669641 in words is "sixty-four billion, three hundred twenty-seven million, six hundred sixty-nine thousand, six hundred forty-one".