722115221961 has 16 divisors (see below), whose sum is σ = 1101265818624. Its totient is φ = 412299857424.

The previous prime is 722115221957. The next prime is 722115222007. The reversal of 722115221961 is 169122511227.

It is not a de Polignac number, because 722115221961 - 2² = 722115221957 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (722115221461) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14032551 + ... + 14083916.

It is an arithmetic number, because the mean of its divisors is an integer number (68829113664).

Almost surely, 2^722115221961 is an apocalyptic number.

It is an amenable number.

722115221961 is a deficient number, since it is larger than the sum of its proper divisors (379150596663).

722115221961 is a wasteful number, since it uses less digits than its factorization.

722115221961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28117700.

The product of its digits is 30240, while the sum is 39.

The spelling of 722115221961 in words is "seven hundred twenty-two billion, one hundred fifteen million, two hundred twenty-one thousand, nine hundred sixty-one".