1901999909376 has 320 divisors, whose sum is σ = 6583995264000. Its totient is φ = 530789511168.

The previous prime is 1901999909357. The next prime is 1901999909389. The reversal of 1901999909376 is 6739099991091.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3932475 + ... + 4389573.

It is an arithmetic number, because the mean of its divisors is an integer number (20574985200).

Almost surely, 2^{1901999909376} is an apocalyptic number.

1901999909376 is a gapful number since it is divisible by the number (16) 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 1901999909376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291997632000).

1901999909376 is an abundant number, since it is smaller than the sum of its proper divisors (4681995354624).

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

1901999909376 is an equidigital number, since it uses as much as digits as its factorization.

1901999909376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457176 (or 457154 counting only the distinct ones).

The product of its (nonzero) digits is 66961566, while the sum is 72.

The spelling of 1901999909376 in words is "one trillion, nine hundred one billion, nine hundred ninety-nine million, nine hundred nine thousand, three hundred seventy-six".