870591633025 has 27 divisors (see below), whose sum is σ = 1086584763369. Its totient is φ = 691953588000.

The previous prime is 870591632983. The next prime is 870591633097. The reversal of 870591633025 is 520336195078.

The square root of 870591633025 is 933055.

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

It can be written as a sum of positive squares in 4 ways, for example, as 467244703809 + 403346929216 = 683553^2 + 635096^2 .

It is not a de Polignac number, because 870591633025 - 2¹⁵ = 870591600257 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 870591633025.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 844414260 + ... + 844415290.

Almost surely, 2^870591633025 is an apocalyptic number.

870591633025 is the 933055-th square number.

870591633025 is the 466528-th centered octagonal number.

It is an amenable number.

870591633025 is a deficient number, since it is larger than the sum of its proper divisors (215993130344).

870591633025 is an frugal number, since it uses more digits than its factorization.

870591633025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

Multiplying 870591633025 by its sum of digits (49), we get a square (42658990018225 = 6531385²).

The spelling of 870591633025 in words is "eight hundred seventy billion, five hundred ninety-one million, six hundred thirty-three thousand, twenty-five".