1621265352200 has 384 divisors, whose sum is σ = 4340459692800. Its totient is φ = 558835200000.

The previous prime is 1621265352197. The next prime is 1621265352283. The reversal of 1621265352200 is 22535621261.

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 95 ways as a sum of consecutive naturals, for example, 327459725 + ... + 327464675.

It is an arithmetic number, because the mean of its divisors is an integer number (11303280450).

Almost surely, 2^{1621265352200} is an apocalyptic number.

1621265352200 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 1621265352200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170229846400).

1621265352200 is an abundant number, since it is smaller than the sum of its proper divisors (2719194340600).

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

1621265352200 is a wasteful number, since it uses less digits than its factorization.

1621265352200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153 (or 5144 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 1621265352200 in words is "one trillion, six hundred twenty-one billion, two hundred sixty-five million, three hundred fifty-two thousand, two hundred".