65651516051 has 4 divisors (see below), whose sum is σ = 71619835704. Its totient is φ = 59683196400.

The previous prime is 65651516033. The next prime is 65651516059. The reversal of 65651516051 is 15061515656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65651516051 - 2³⁰ = 64577774227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65651516059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2984159810 + ... + 2984159831.

It is an arithmetic number, because the mean of its divisors is an integer number (17904958926).

Almost surely, 2^65651516051 is an apocalyptic number.

65651516051 is a deficient number, since it is larger than the sum of its proper divisors (5968319653).

65651516051 is a wasteful number, since it uses less digits than its factorization.

65651516051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968319652.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 65651516051 in words is "sixty-five billion, six hundred fifty-one million, five hundred sixteen thousand, fifty-one".