989570397485 has 24 divisors (see below), whose sum is σ = 1193009728680. Its totient is φ = 787988348928.

The previous prime is 989570397463. The next prime is 989570397499. The reversal of 989570397485 is 584793075989.

It can be written as a sum of positive squares in 12 ways, for example, as 364605838276 + 624964559209 = 603826^2 + 790547^2 .

It is not a de Polignac number, because 989570397485 - 2⁶ = 989570397421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 468323789 + ... + 468325901.

It is an arithmetic number, because the mean of its divisors is an integer number (49708738695).

Almost surely, 2^989570397485 is an apocalyptic number.

It is an amenable number.

989570397485 is a deficient number, since it is larger than the sum of its proper divisors (203439331195).

989570397485 is an equidigital number, since it uses as much as digits as its factorization.

989570397485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585 (or 3236 counting only the distinct ones).

The product of its (nonzero) digits is 685843200, while the sum is 74.

The spelling of 989570397485 in words is "nine hundred eighty-nine billion, five hundred seventy million, three hundred ninety-seven thousand, four hundred eighty-five".