7721345254720 has 56 divisors (see below), whose sum is σ = 18457996204584. Its totient is φ = 3076520411136.

The previous prime is 7721345254709. The next prime is 7721345254741. The reversal of 7721345254720 is 274525431277.

It can be written as a sum of positive squares in 4 ways, for example, as 3356722322496 + 4364622932224 = 1832136^2 + 2089168^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46861737 + ... + 47026216.

Almost surely, 2^{7721345254720} is an apocalyptic number.

It is an amenable number.

7721345254720 is an abundant number, since it is smaller than the sum of its proper divisors (10736650949864).

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

7721345254720 is a wasteful number, since it uses less digits than its factorization.

7721345254720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93888227 (or 93888217 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 49.

The spelling of 7721345254720 in words is "seven trillion, seven hundred twenty-one billion, three hundred forty-five million, two hundred fifty-four thousand, seven hundred twenty".