1990142885456 has 80 divisors (see below), whose sum is σ = 4298550018048. Its totient is φ = 884824867200.

The previous prime is 1990142885441. The next prime is 1990142885459. The reversal of 1990142885456 is 6545882410991.

It is a super-2 number, since 2×1990142885456² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990142885459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13684001 + ... + 13828671.

Almost surely, 2^{1990142885456} is an apocalyptic number.

1990142885456 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 1990142885456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149275009024).

1990142885456 is an abundant number, since it is smaller than the sum of its proper divisors (2308407132592).

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

1990142885456 is a wasteful number, since it uses less digits than its factorization.

1990142885456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146400 (or 146394 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 62.

The spelling of 1990142885456 in words is "one trillion, nine hundred ninety billion, one hundred forty-two million, eight hundred eighty-five thousand, four hundred fifty-six".