1989097589746 has 8 divisors (see below), whose sum is σ = 3113370140544. Its totient is φ = 951307542900.

The previous prime is 1989097589669. The next prime is 1989097589753. The reversal of 1989097589746 is 6479857909891.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1989097589746.

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, 21620625930 + ... + 21620626021.

It is an arithmetic number, because the mean of its divisors is an integer number (389171267568).

Almost surely, 2^{1989097589746} is an apocalyptic number.

1989097589746 is a deficient number, since it is larger than the sum of its proper divisors (1124272550798).

1989097589746 is a wasteful number, since it uses less digits than its factorization.

1989097589746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43241251976.

The product of its (nonzero) digits is 2469035520, while the sum is 82.

The spelling of 1989097589746 in words is "one trillion, nine hundred eighty-nine billion, ninety-seven million, five hundred eighty-nine thousand, seven hundred forty-six".