1990364858496 has 384 divisors, whose sum is σ = 7112485785600. Its totient is φ = 521365248000.

The previous prime is 1990364858453. The next prime is 1990364858551. The reversal of 1990364858496 is 6948584630991.

1990364858496 is a `hidden beast` number, since 1 + 9 + 9 + 0 + 36 + 4 + 8 + 584 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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

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, 4540171 + ... + 4959221.

It is an arithmetic number, because the mean of its divisors is an integer number (18522098400).

Almost surely, 2^{1990364858496} is an apocalyptic number.

1990364858496 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 1990364858496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3556242892800).

1990364858496 is an abundant number, since it is smaller than the sum of its proper divisors (5122120927104).

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

1990364858496 is a wasteful number, since it uses less digits than its factorization.

1990364858496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419128 (or 419113 counting only the distinct ones).

The product of its (nonzero) digits is 403107840, while the sum is 72.

The spelling of 1990364858496 in words is "one trillion, nine hundred ninety billion, three hundred sixty-four million, eight hundred fifty-eight thousand, four hundred ninety-six".