861963228025 has 12 divisors (see below), whose sum is σ = 1071385333200. Its totient is φ = 687924820880.

The previous prime is 861963228019. The next prime is 861963228031. The reversal of 861963228025 is 520822369168.

It is an interprime number because it is at equal distance from previous prime (861963228019) and next prime (861963228031).

It is not a de Polignac number, because 861963228025 - 2⁹ = 861963227513 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41133355 + ... + 41154304.

It is an arithmetic number, because the mean of its divisors is an integer number (89282111100).

Almost surely, 2^861963228025 is an apocalyptic number.

It is an amenable number.

861963228025 is a deficient number, since it is larger than the sum of its proper divisors (209422105175).

861963228025 is a wasteful number, since it uses less digits than its factorization.

861963228025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82288088 (or 82288083 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 861963228025 in words is "eight hundred sixty-one billion, nine hundred sixty-three million, two hundred twenty-eight thousand, twenty-five".