961636614121 has 4 divisors (see below), whose sum is σ = 970972892032. Its totient is φ = 952300336212.

The previous prime is 961636614089. The next prime is 961636614139. The reversal of 961636614121 is 121416636169.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 961636614121 - 2⁵ = 961636614089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961636614181) 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, 4668138801 + ... + 4668139006.

It is an arithmetic number, because the mean of its divisors is an integer number (242743223008).

Almost surely, 2^961636614121 is an apocalyptic number.

It is an amenable number.

961636614121 is a deficient number, since it is larger than the sum of its proper divisors (9336277911).

961636614121 is a wasteful number, since it uses less digits than its factorization.

961636614121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336277910.

The product of its digits is 279936, while the sum is 46.

The spelling of 961636614121 in words is "nine hundred sixty-one billion, six hundred thirty-six million, six hundred fourteen thousand, one hundred twenty-one".