721154880000 has 1600 divisors, whose sum is σ = 2945297203200. Its totient is φ = 173352960000.

The previous prime is 721154879969. The next prime is 721154880007. The reversal of 721154880000 is 88451127.

It is a tau number, because it is divible by the number of its divisors (1600).

It is a super-3 number, since 3×721154880000³ (a number of 37 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721154880007) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3775679905 + ... + 3775680095.

It is an arithmetic number, because the mean of its divisors is an integer number (1840810752).

Almost surely, 2^721154880000 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 721154880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472648601600).

721154880000 is an abundant number, since it is smaller than the sum of its proper divisors (2224142323200).

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

721154880000 is a wasteful number, since it uses less digits than its factorization.

721154880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 721154880000 in words is "seven hundred twenty-one billion, one hundred fifty-four million, eight hundred eighty thousand".