65379421636 has 27 divisors (see below), whose sum is σ = 115235096781. Its totient is φ = 32456773584.

The previous prime is 65379421633. The next prime is 65379421637. The reversal of 65379421636 is 63612497356.

It is a happy number.

The square root of 65379421636 is 255694.

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., 59472576900 + 5906844736 = 243870^2 + 76856^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65379421633) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 88469755 + ... + 88470493.

Almost surely, 2^65379421636 is an apocalyptic number.

65379421636 is the 255694-th square number.

It is an amenable number.

65379421636 is a deficient number, since it is larger than the sum of its proper divisors (49855675145).

65379421636 is an frugal number, since it uses more digits than its factorization.

65379421636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828 (or 914 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 52.

The spelling of 65379421636 in words is "sixty-five billion, three hundred seventy-nine million, four hundred twenty-one thousand, six hundred thirty-six".