1989051630971 has 8 divisors (see below), whose sum is σ = 1989911394000. Its totient is φ = 1988191988640.

The previous prime is 1989051630911. The next prime is 1989051631001. The reversal of 1989051630971 is 1790361509891.

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

It is a cyclic number.

It is not a de Polignac number, because 1989051630971 - 2¹⁴ = 1989051614587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1989051630971.

It is not an unprimeable number, because it can be changed into a prime (1989051630911) 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, 49472345 + ... + 49512533.

It is an arithmetic number, because the mean of its divisors is an integer number (248738924250).

Almost surely, 2^{1989051630971} is an apocalyptic number.

1989051630971 is a deficient number, since it is larger than the sum of its proper divisors (859763029).

1989051630971 is a wasteful number, since it uses less digits than its factorization.

1989051630971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60349.

The product of its (nonzero) digits is 3674160, while the sum is 59.

The spelling of 1989051630971 in words is "one trillion, nine hundred eighty-nine billion, fifty-one million, six hundred thirty thousand, nine hundred seventy-one".