8161839125 has 16 divisors (see below), whose sum is σ = 11111974848. Its totient is φ = 5935882000.

The previous prime is 8161839067. The next prime is 8161839137. The reversal of 8161839125 is 5219381618.

It is not a de Polignac number, because 8161839125 - 2²⁸ = 7893403669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2966567 + ... + 2969316.

It is an arithmetic number, because the mean of its divisors is an integer number (694498428).

Almost surely, 2^8161839125 is an apocalyptic number.

It is an amenable number.

8161839125 is a deficient number, since it is larger than the sum of its proper divisors (2950135723).

8161839125 is a wasteful number, since it uses less digits than its factorization.

8161839125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5935909 (or 5935899 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 8161839125 is about 90342.8974795473. The cubic root of 8161839125 is about 2013.3966581663.

The spelling of 8161839125 in words is "eight billion, one hundred sixty-one million, eight hundred thirty-nine thousand, one hundred twenty-five".