1621360805000 has 240 divisors, whose sum is σ = 4095930070320. Its totient is φ = 601248384000.

The previous prime is 1621360804991. The next prime is 1621360805021. The reversal of 1621360805000 is 5080631261.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 96806627 + ... + 96823373.

It is an arithmetic number, because the mean of its divisors is an integer number (17066375293).

Almost surely, 2^{1621360805000} is an apocalyptic number.

1621360805000 is a gapful number since it is divisible by the number (10) 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 1621360805000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2047965035160).

1621360805000 is an abundant number, since it is smaller than the sum of its proper divisors (2474569265320).

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

1621360805000 is a wasteful number, since it uses less digits than its factorization.

1621360805000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16874 (or 16838 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 1621360805000 in words is "one trillion, six hundred twenty-one billion, three hundred sixty million, eight hundred five thousand".