1989951216145 has 8 divisors (see below), whose sum is σ = 2399941166400. Its totient is φ = 1583961168240.

The previous prime is 1989951216109. The next prime is 1989951216151. The reversal of 1989951216145 is 5416121599891.

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

It is not a de Polignac number, because 1989951216145 - 2⁷ = 1989951216017 is a prime.

It is a super-2 number, since 2×1989951216145² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999974491 + ... + 999976480.

It is an arithmetic number, because the mean of its divisors is an integer number (299992645800).

Almost surely, 2^{1989951216145} is an apocalyptic number.

It is an amenable number.

1989951216145 is a deficient number, since it is larger than the sum of its proper divisors (409989950255).

1989951216145 is a wasteful number, since it uses less digits than its factorization.

1989951216145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999951175.

The product of its digits is 6998400, while the sum is 61.

The spelling of 1989951216145 in words is "one trillion, nine hundred eighty-nine billion, nine hundred fifty-one million, two hundred sixteen thousand, one hundred forty-five".