397721626623360 has 2560 divisors, whose sum is σ = 1588668302390400. Its totient is φ = 94213767168000.

The previous prime is 397721626623353. The next prime is 397721626623361. The reversal of 397721626623360 is 63326626127793.

397721626623360 is a `hidden beast` number, since 3 + 9 + 7 + 7 + 2 + 1 + 6 + 266 + 2 + 3 + 360 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397721626623361) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 389541259650 + ... + 389541260670.

Almost surely, 2^{397721626623360} is an apocalyptic number.

397721626623360 is a gapful number since it is divisible by the number (30) 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 397721626623360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794334151195200).

397721626623360 is an abundant number, since it is smaller than the sum of its proper divisors (1190946675767040).

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

397721626623360 is a wasteful number, since it uses less digits than its factorization.

397721626623360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 63.

The spelling of 397721626623360 in words is "three hundred ninety-seven trillion, seven hundred twenty-one billion, six hundred twenty-six million, six hundred twenty-three thousand, three hundred sixty".