989835959025 has 45 divisors (see below), whose sum is σ = 1833601296241. Its totient is φ = 527888633760.

The previous prime is 989835959023. The next prime is 989835959039. The reversal of 989835959025 is 520959538989.

The square root of 989835959025 is 994905.

It is a perfect power (a square), and thus also a powerful number.

989835959025 is a `hidden beast` number, since 9 + 8 + 9 + 8 + 3 + 5 + 9 + 590 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 291434783409 + 698401175616 = 539847^2 + 835704^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 989835959025 - 2¹ = 989835959023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989835959023) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 44759671 + ... + 44781779.

Almost surely, 2^989835959025 is an apocalyptic number.

989835959025 is the 994905-th square number.

989835959025 is the 497453-rd centered octagonal number.

It is an amenable number.

989835959025 is a deficient number, since it is larger than the sum of its proper divisors (843765337216).

989835959025 is an frugal number, since it uses more digits than its factorization.

989835959025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44240 (or 22117 counting only the distinct ones).

The product of its (nonzero) digits is 314928000, while the sum is 72.

The spelling of 989835959025 in words is "nine hundred eighty-nine billion, eight hundred thirty-five million, nine hundred fifty-nine thousand, twenty-five".