989951741649 has 96 divisors (see below), whose sum is σ = 1597527835904. Its totient is φ = 586773849600.

The previous prime is 989951741627. The next prime is 989951741651. The reversal of 989951741649 is 946147159989.

989951741649 is a `hidden beast` number, since 9 + 8 + 9 + 9 + 517 + 41 + 64 + 9 = 666.

It is not a de Polignac number, because 989951741649 - 2¹³ = 989951733457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989951742649) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 200676987 + ... + 200681919.

Almost surely, 2^989951741649 is an apocalyptic number.

It is an amenable number.

989951741649 is a deficient number, since it is larger than the sum of its proper divisors (607576094255).

989951741649 is a wasteful number, since it uses less digits than its factorization.

989951741649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447 (or 5444 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 72.

The spelling of 989951741649 in words is "nine hundred eighty-nine billion, nine hundred fifty-one million, seven hundred forty-one thousand, six hundred forty-nine".