621411256400 has 240 divisors, whose sum is σ = 1769691494400. Its totient is φ = 207168192000.

The previous prime is 621411256331. The next prime is 621411256421. The reversal of 621411256400 is 4652114126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2471711 + ... + 2711489.

It is an arithmetic number, because the mean of its divisors is an integer number (7373714560).

Almost surely, 2^621411256400 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 621411256400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884845747200).

621411256400 is an abundant number, since it is smaller than the sum of its proper divisors (1148280238000).

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

621411256400 is a wasteful number, since it uses less digits than its factorization.

621411256400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239858 (or 239847 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 621411256400 in words is "six hundred twenty-one billion, four hundred eleven million, two hundred fifty-six thousand, four hundred".