1990153764812 has 12 divisors (see below), whose sum is σ = 3484516603176. Its totient is φ = 994577592480.

The previous prime is 1990153764773. The next prime is 1990153764883. The reversal of 1990153764812 is 2184673510991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124813514 + ... + 124829457.

It is an arithmetic number, because the mean of its divisors is an integer number (290376383598).

It is a 1-persistent number, because it is pandigital, but 2⋅1990153764812 = 3980307529624 is not.

Almost surely, 2^{1990153764812} is an apocalyptic number.

It is an amenable number.

1990153764812 is a deficient number, since it is larger than the sum of its proper divisors (1494362838364).

1990153764812 is a wasteful number, since it uses less digits than its factorization.

1990153764812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249644968 (or 249644966 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 1990153764812 in words is "one trillion, nine hundred ninety billion, one hundred fifty-three million, seven hundred sixty-four thousand, eight hundred twelve".