899900774161 has 27 divisors (see below), whose sum is σ = 945340775337. Its totient is φ = 856613793000.

The previous prime is 899900774147. The next prime is 899900774221. The reversal of 899900774161 is 161477009998.

The square root of 899900774161 is 948631.

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

It is not a de Polignac number, because 899900774161 - 2¹⁹ = 899900249873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 899900774161.

It is not an unprimeable number, because it can be changed into a prime (899900774261) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2087936616 + ... + 2087937046.

Almost surely, 2^899900774161 is an apocalyptic number.

899900774161 is the 948631-st square number.

899900774161 is the 474316-th centered octagonal number.

It is an amenable number.

899900774161 is a deficient number, since it is larger than the sum of its proper divisors (45440001176).

899900774161 is an frugal number, since it uses more digits than its factorization.

899900774161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 899900774161 in words is "eight hundred ninety-nine billion, nine hundred million, seven hundred seventy-four thousand, one hundred sixty-one".