721225986792 has 32 divisors (see below), whose sum is σ = 1803102122400. Its totient is φ = 240403708224.

The previous prime is 721225986791. The next prime is 721225986827. The reversal of 721225986792 is 297689522127.

It is not an unprimeable number, because it can be changed into a prime (721225986791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990759 + ... + 1556937.

It is an arithmetic number, because the mean of its divisors is an integer number (56346941325).

Almost surely, 2^721225986792 is an apocalyptic number.

It is an amenable number.

721225986792 is an abundant number, since it is smaller than the sum of its proper divisors (1081876135608).

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

721225986792 is a wasteful number, since it uses less digits than its factorization.

721225986792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619265 (or 619261 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 60.

The spelling of 721225986792 in words is "seven hundred twenty-one billion, two hundred twenty-five million, nine hundred eighty-six thousand, seven hundred ninety-two".