621661950 has 576 divisors, whose sum is σ = 2339850240. Its totient is φ = 114462720.

The previous prime is 621661921. The next prime is 621661961. The reversal of 621661950 is 59166126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 13226827 + ... + 13226873.

It is an arithmetic number, because the mean of its divisors is an integer number (4062240).

Almost surely, 2^621661950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621661950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169925120).

621661950 is an abundant number, since it is smaller than the sum of its proper divisors (1718188290).

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

621661950 is a wasteful number, since it uses less digits than its factorization.

621661950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 621661950 is about 24933.1496205353. The cubic root of 621661950 is about 853.4631260433.

The spelling of 621661950 in words is "six hundred twenty-one million, six hundred sixty-one thousand, nine hundred fifty".