65331615605 has 4 divisors (see below), whose sum is σ = 78397938732. Its totient is φ = 52265292480.

The previous prime is 65331615589. The next prime is 65331615619. The reversal of 65331615605 is 50651613356.

It is a happy number.

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 46439388004 + 18892227601 = 215498^2 + 137449^2 .

It is not a de Polignac number, because 65331615605 - 2⁴ = 65331615589 is a prime.

It is a Duffinian number.

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, 6533161556 + ... + 6533161565.

It is an arithmetic number, because the mean of its divisors is an integer number (19599484683).

Almost surely, 2^65331615605 is an apocalyptic number.

It is an amenable number.

65331615605 is a deficient number, since it is larger than the sum of its proper divisors (13066323127).

65331615605 is a wasteful number, since it uses less digits than its factorization.

65331615605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13066323126.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 65331615605 in words is "sixty-five billion, three hundred thirty-one million, six hundred fifteen thousand, six hundred five".