1921616361000 has 192 divisors, whose sum is σ = 7422929729280. Its totient is φ = 439226582400.

The previous prime is 1921616360987. The next prime is 1921616361037. The reversal of 1921616361000 is 1636161291.

1921616361000 is a `hidden beast` number, since 1 + 9 + 2 + 1 + 6 + 1 + 636 + 10 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15187924 + ... + 15313923.

It is an arithmetic number, because the mean of its divisors is an integer number (38661092340).

Almost surely, 2^{1921616361000} is an apocalyptic number.

1921616361000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1921616361000 is an abundant number, since it is smaller than the sum of its proper divisors (5501313368280).

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

1921616361000 is a wasteful number, since it uses less digits than its factorization.

1921616361000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30501881 (or 30501864 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 1921616361000 in words is "one trillion, nine hundred twenty-one billion, six hundred sixteen million, three hundred sixty-one thousand".