721183869120 has 896 divisors, whose sum is σ = 2810493987840. Its totient is φ = 154271416320.

The previous prime is 721183869113. The next prime is 721183869137. The reversal of 721183869120 is 21968381127.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 721183869120.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 425978994 + ... + 425980686.

It is an arithmetic number, because the mean of its divisors is an integer number (3136712040).

Almost surely, 2^721183869120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721183869120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1405246993920).

721183869120 is an abundant number, since it is smaller than the sum of its proper divisors (2089310118720).

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

721183869120 is a wasteful number, since it uses less digits than its factorization.

721183869120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 721183869120 in words is "seven hundred twenty-one billion, one hundred eighty-three million, eight hundred sixty-nine thousand, one hundred twenty".