621863055475140 has 192 divisors, whose sum is σ = 1788618075116544. Its totient is φ = 161375966433792.

The previous prime is 621863055475133. The next prime is 621863055475163. The reversal of 621863055475140 is 41574550368126.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5667827562 + ... + 5667937278.

It is an arithmetic number, because the mean of its divisors is an integer number (9315719141232).

Almost surely, 2^{621863055475140} is an apocalyptic number.

621863055475140 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 621863055475140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894309037558272).

621863055475140 is an abundant number, since it is smaller than the sum of its proper divisors (1166755019641404).

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

621863055475140 is a wasteful number, since it uses less digits than its factorization.

621863055475140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126866 (or 126864 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 57.

The spelling of 621863055475140 in words is "six hundred twenty-one trillion, eight hundred sixty-three billion, fifty-five million, four hundred seventy-five thousand, one hundred forty".