1990712853989 has 16 divisors (see below), whose sum is σ = 2118939118848. Its totient is φ = 1863724634112.

The previous prime is 1990712853979. The next prime is 1990712854069. The reversal of 1990712853989 is 9893582170991.

It is a cyclic number.

It is not a de Polignac number, because 1990712853989 - 2²⁰ = 1990711805413 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 (1990712853979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44228354 + ... + 44273340.

It is an arithmetic number, because the mean of its divisors is an integer number (132433694928).

Almost surely, 2^{1990712853989} is an apocalyptic number.

It is an amenable number.

1990712853989 is a deficient number, since it is larger than the sum of its proper divisors (128226264859).

1990712853989 is a wasteful number, since it uses less digits than its factorization.

1990712853989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58684.

The product of its (nonzero) digits is 88179840, while the sum is 71.

The spelling of 1990712853989 in words is "one trillion, nine hundred ninety billion, seven hundred twelve million, eight hundred fifty-three thousand, nine hundred eighty-nine".