721056273265160 has 64 divisors (see below), whose sum is σ = 1854147045945600. Its totient is φ = 247218981255936.

The previous prime is 721056273265121. The next prime is 721056273265247. The reversal of 721056273265160 is 61562372650127.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379141106 + ... + 381038174.

It is an arithmetic number, because the mean of its divisors is an integer number (28971047592900).

Almost surely, 2^{721056273265160} is an apocalyptic number.

721056273265160 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

721056273265160 is an abundant number, since it is smaller than the sum of its proper divisors (1133090772680440).

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

721056273265160 is a wasteful number, since it uses less digits than its factorization.

721056273265160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254550 (or 3254546 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 721056273265160 in words is "seven hundred twenty-one trillion, fifty-six billion, two hundred seventy-three million, two hundred sixty-five thousand, one hundred sixty".