720454907997 has 40 divisors (see below), whose sum is σ = 1177826158080. Its totient is φ = 435244155840.

The previous prime is 720454907989. The next prime is 720454908023. The reversal of 720454907997 is 799709454027.

720454907997 is a `hidden beast` number, since 7 + 2 + 0 + 454 + 90 + 7 + 9 + 97 = 666.

It is not a de Polignac number, because 720454907997 - 2³ = 720454907989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720454907917) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1012797 + ... + 1570562.

It is an arithmetic number, because the mean of its divisors is an integer number (29445653952).

Almost surely, 2^720454907997 is an apocalyptic number.

It is an amenable number.

720454907997 is a deficient number, since it is larger than the sum of its proper divisors (457371250083).

720454907997 is a wasteful number, since it uses less digits than its factorization.

720454907997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583695 (or 2583686 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 63.

The spelling of 720454907997 in words is "seven hundred twenty billion, four hundred fifty-four million, nine hundred seven thousand, nine hundred ninety-seven".