722821101649920 has 3000 divisors, whose sum is σ = 3265868338485984. Its totient is φ = 151594091937792.

The previous prime is 722821101649859. The next prime is 722821101649931. The reversal of 722821101649920 is 29946101128227.

722821101649920 is a `hidden beast` number, since 7 + 2 + 2 + 8 + 2 + 110 + 16 + 499 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4328270069677 + ... + 4328270069843.

Almost surely, 2^{722821101649920} is an apocalyptic number.

722821101649920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722821101649920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632934169242992).

722821101649920 is an abundant number, since it is smaller than the sum of its proper divisors (2543047236836064).

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

722821101649920 is an frugal number, since it uses more digits than its factorization.

722821101649920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 722821101649920 in words is "seven hundred twenty-two trillion, eight hundred twenty-one billion, one hundred one million, six hundred forty-nine thousand, nine hundred twenty".