721553203432704 has 36 divisors (see below), whose sum is σ = 1920383786221376. Its totient is φ = 240517734477312.

The previous prime is 721553203432703. The next prime is 721553203432723. The reversal of 721553203432704 is 407234302355127.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721553203432703) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 469761199384 + ... + 469761200919.

Almost surely, 2^{721553203432704} is an apocalyptic number.

It is an amenable number.

721553203432704 is an abundant number, since it is smaller than the sum of its proper divisors (1198830582788672).

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

721553203432704 is an equidigital number, since it uses as much as digits as its factorization.

721553203432704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939522400322 (or 939522400308 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 48.

The spelling of 721553203432704 in words is "seven hundred twenty-one trillion, five hundred fifty-three billion, two hundred three million, four hundred thirty-two thousand, seven hundred four".