31845085491025 has 9 divisors (see below), whose sum is σ = 39487940996401. Its totient is φ = 25476045820240.

The previous prime is 31845085491019. The next prime is 31845085491077. The reversal of 31845085491025 is 52019458054813.

It is a happy number.

The square root of 31845085491025 is 5643145.

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 491088403729 + 31353997087296 = 700777^2 + 5599464^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31845085491025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27651411 + ... + 28780039.

Almost surely, 2^{31845085491025} is an apocalyptic number.

31845085491025 is the 5643145-th square number.

31845085491025 is the 2821573-rd centered octagonal number.

It is an amenable number.

31845085491025 is a deficient number, since it is larger than the sum of its proper divisors (7642855505376).

31845085491025 is an frugal number, since it uses more digits than its factorization.

31845085491025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257268 (or 1128634 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 55.

The spelling of 31845085491025 in words is "thirty-one trillion, eight hundred forty-five billion, eighty-five million, four hundred ninety-one thousand, twenty-five".