125609816 has 8 divisors (see below), whose sum is σ = 235518420. Its totient is φ = 62804904.

The previous prime is 125609807. The next prime is 125609851. The reversal of 125609816 is 618906521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 125609816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850606 + ... + 7850621.

Almost surely, 2^125609816 is an apocalyptic number.

It is an amenable number.

125609816 is a deficient number, since it is larger than the sum of its proper divisors (109908604).

125609816 is a wasteful number, since it uses less digits than its factorization.

125609816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701233 (or 15701229 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 125609816 is about 11207.5785074208. The cubic root of 125609816 is about 500.8117693478.

The spelling of 125609816 in words is "one hundred twenty-five million, six hundred nine thousand, eight hundred sixteen".