65616505615 has 8 divisors (see below), whose sum is σ = 78745172688. Its totient is φ = 52489627200.

The previous prime is 65616505609. The next prime is 65616505631. The reversal of 65616505615 is 51650561656.

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

It is not a de Polignac number, because 65616505615 - 2⁵ = 65616505583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365086 + ... + 514315.

It is an arithmetic number, because the mean of its divisors is an integer number (9843146586).

Almost surely, 2^65616505615 is an apocalyptic number.

65616505615 is a deficient number, since it is larger than the sum of its proper divisors (13128667073).

65616505615 is a wasteful number, since it uses less digits than its factorization.

65616505615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894329.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 65616505615 in words is "sixty-five billion, six hundred sixteen million, five hundred five thousand, six hundred fifteen".