1621363848192 has 880 divisors, whose sum is σ = 5482720172160. Its totient is φ = 472979865600.

The previous prime is 1621363848173. The next prime is 1621363848197. The reversal of 1621363848192 is 2918483631261.

It is a happy number.

1621363848192 is a `hidden beast` number, since 1 + 6 + 2 + 13 + 63 + 8 + 481 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621363848197) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3329288973 + ... + 3329289459.

It is an arithmetic number, because the mean of its divisors is an integer number (6230363832).

Almost surely, 2^{1621363848192} is an apocalyptic number.

1621363848192 is a gapful number since it is divisible by the number (12) 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 1621363848192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2741360086080).

1621363848192 is an abundant number, since it is smaller than the sum of its proper divisors (3861356323968).

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

1621363848192 is a wasteful number, since it uses less digits than its factorization.

1621363848192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 633 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 1621363848192 in words is "one trillion, six hundred twenty-one billion, three hundred sixty-three million, eight hundred forty-eight thousand, one hundred ninety-two".