720421972992 has 330 divisors, whose sum is σ = 2183314339844. Its totient is φ = 236620984320.

The previous prime is 720421972969. The next prime is 720421973003. The reversal of 720421972992 is 299279124027.

720421972992 is a `hidden beast` number, since 7 + 20 + 421 + 97 + 29 + 92 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 418119843 + ... + 418121565.

Almost surely, 2^720421972992 is an apocalyptic number.

720421972992 is a gapful number since it is divisible by the number (72) 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 720421972992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091657169922).

720421972992 is an abundant number, since it is smaller than the sum of its proper divisors (1462892366852).

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

720421972992 is an equidigital number, since it uses as much as digits as its factorization.

720421972992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 720421972992 in words is "seven hundred twenty billion, four hundred twenty-one million, nine hundred seventy-two thousand, nine hundred ninety-two".