7721651024612 has 18 divisors (see below), whose sum is σ = 15719075300502. Its totient is φ = 3309279010464.

The previous prime is 7721651024573. The next prime is 7721651024623. The reversal of 7721651024612 is 2164201561277.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7355681682496 + 365969342116 = 2712136^2 + 604954^2 .

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 5 ways as a sum of consecutive naturals, for example, 19698089153 + ... + 19698089544.

It is an arithmetic number, because the mean of its divisors is an integer number (873281961139).

Almost surely, 2^{7721651024612} is an apocalyptic number.

It is an amenable number.

7721651024612 is an abundant number, since it is smaller than the sum of its proper divisors (7997424275890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7721651024612 is a wasteful number, since it uses less digits than its factorization.

7721651024612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39396178715 (or 39396178706 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

Adding to 7721651024612 its reverse (2164201561277), we get a palindrome (9885852585889).

The spelling of 7721651024612 in words is "seven trillion, seven hundred twenty-one billion, six hundred fifty-one million, twenty-four thousand, six hundred twelve".