989145612461 has 4 divisors (see below), whose sum is σ = 989173248000. Its totient is φ = 989117976924.

The previous prime is 989145612457. The next prime is 989145612529. The reversal of 989145612461 is 164216541989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 989145612461 - 2² = 989145612457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989145612397 and 989145612406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989145612431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13764011 + ... + 13835688.

It is an arithmetic number, because the mean of its divisors is an integer number (247293312000).

Almost surely, 2^989145612461 is an apocalyptic number.

It is an amenable number.

989145612461 is a deficient number, since it is larger than the sum of its proper divisors (27635539).

989145612461 is a wasteful number, since it uses less digits than its factorization.

989145612461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27635538.

The product of its digits is 3732480, while the sum is 56.

The spelling of 989145612461 in words is "nine hundred eighty-nine billion, one hundred forty-five million, six hundred twelve thousand, four hundred sixty-one".