1990681731941 has 8 divisors (see below), whose sum is σ = 2275079505984. Its totient is φ = 1706287625280.

The previous prime is 1990681731917. The next prime is 1990681731979. The reversal of 1990681731941 is 1491371860991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1990681731941 - 2³⁴ = 1973501862757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990681731901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365981 + ... + 2028621.

It is an arithmetic number, because the mean of its divisors is an integer number (284384938248).

Almost surely, 2^{1990681731941} is an apocalyptic number.

It is an amenable number.

1990681731941 is a deficient number, since it is larger than the sum of its proper divisors (284397774043).

1990681731941 is a wasteful number, since it uses less digits than its factorization.

1990681731941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833691.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The spelling of 1990681731941 in words is "one trillion, nine hundred ninety billion, six hundred eighty-one million, seven hundred thirty-one thousand, nine hundred forty-one".