621349397760 has 1152 divisors, whose sum is σ = 2584505548800. Its totient is φ = 123686092800.

The previous prime is 621349397759. The next prime is 621349397789. The reversal of 621349397760 is 67793943126.

It is a self number, because there is not a number n which added to its sum of digits gives 621349397760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 444137541 + ... + 444138939.

It is an arithmetic number, because the mean of its divisors is an integer number (2243494400).

Almost surely, 2^621349397760 is an apocalyptic number.

621349397760 is a gapful number since it is divisible by the number (60) 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 621349397760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292252774400).

621349397760 is an abundant number, since it is smaller than the sum of its proper divisors (1963156151040).

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

621349397760 is a wasteful number, since it uses less digits than its factorization.

621349397760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1501 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 57.

The spelling of 621349397760 in words is "six hundred twenty-one billion, three hundred forty-nine million, three hundred ninety-seven thousand, seven hundred sixty".