797457899520 has 448 divisors, whose sum is σ = 2881955810880. Its totient is φ = 209151590400.

The previous prime is 797457899479. The next prime is 797457899527. The reversal of 797457899520 is 25998754797.

797457899520 is a `hidden beast` number, since 7 + 9 + 7 + 4 + 5 + 7 + 8 + 99 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797457899527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67455210 + ... + 67467030.

Almost surely, 2^797457899520 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 797457899520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440977905440).

797457899520 is an abundant number, since it is smaller than the sum of its proper divisors (2084497911360).

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

797457899520 is a wasteful number, since it uses less digits than its factorization.

797457899520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11922 (or 11892 counting only the distinct ones).

The product of its (nonzero) digits is 400075200, while the sum is 72.

The spelling of 797457899520 in words is "seven hundred ninety-seven billion, four hundred fifty-seven million, eight hundred ninety-nine thousand, five hundred twenty".