1621163994300 has 540 divisors, whose sum is σ = 5763201444000. Its totient is φ = 392821954560.

The previous prime is 1621163994257. The next prime is 1621163994347. The reversal of 1621163994300 is 34993611261.

1621163994300 is a `hidden beast` number, since 1 + 6 + 2 + 1 + 1 + 639 + 9 + 4 + 3 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 115798701 + ... + 115812699.

Almost surely, 2^{1621163994300} is an apocalyptic number.

1621163994300 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 1621163994300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2881600722000).

1621163994300 is an abundant number, since it is smaller than the sum of its proper divisors (4142037449700).

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

1621163994300 is a wasteful number, since it uses less digits than its factorization.

1621163994300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100 (or 14055 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 1621163994300 in words is "one trillion, six hundred twenty-one billion, one hundred sixty-three million, nine hundred ninety-four thousand, three hundred".