65615051601 has 24 divisors (see below), whose sum is σ = 106187837184. Its totient is φ = 38691920160.

The previous prime is 65615051597. The next prime is 65615051651. The reversal of 65615051601 is 10615051656.

It is not a de Polignac number, because 65615051601 - 2² = 65615051597 is a prime.

It is a super-3 number, since 3×65615051601³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (65615051651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8952801 + ... + 8960126.

It is an arithmetic number, because the mean of its divisors is an integer number (4424493216).

Almost surely, 2^65615051601 is an apocalyptic number.

It is an amenable number.

65615051601 is a deficient number, since it is larger than the sum of its proper divisors (40572785583).

65615051601 is a wasteful number, since it uses less digits than its factorization.

65615051601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17912981 (or 17912978 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

Subtracting from 65615051601 its reverse (10615051656), we obtain a palindrome (54999999945).

The spelling of 65615051601 in words is "sixty-five billion, six hundred fifteen million, fifty-one thousand, six hundred one".