721070043904 has 288 divisors, whose sum is σ = 1704021774336. Its totient is φ = 298178150400.

The previous prime is 721070043893. The next prime is 721070043949. The reversal of 721070043904 is 409340070127.

721070043904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×721070043904² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1964768329 + ... + 1964768695.

It is an arithmetic number, because the mean of its divisors is an integer number (5916742272).

Almost surely, 2^721070043904 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 721070043904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852010887168).

721070043904 is an abundant number, since it is smaller than the sum of its proper divisors (982951730432).

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

721070043904 is a wasteful number, since it uses less digits than its factorization.

721070043904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 721070043904 in words is "seven hundred twenty-one billion, seventy million, forty-three thousand, nine hundred four".