800000000125 has 64 divisors (see below), whose sum is σ = 1070225327808. Its totient is φ = 596044800000.

The previous prime is 800000000117. The next prime is 800000000131. The reversal of 800000000125 is 521000000008.

It is a happy number.

It can be written as a sum of positive squares in 32 ways, for example, as 782032474276 + 17967525849 = 884326^2 + 134043^2 .

It is a sliding number, since 800000000125 = 125 + 800000000000 and 1/125 + 1/800000000000 = 0.00800000000125.

It is not a de Polignac number, because 800000000125 - 2³ = 800000000117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 800000000099 and 800000000108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10010325 + ... + 10089925.

It is an arithmetic number, because the mean of its divisors is an integer number (16722270747).

Almost surely, 2^800000000125 is an apocalyptic number.

It is an amenable number.

800000000125 is a deficient number, since it is larger than the sum of its proper divisors (270225327683).

800000000125 is a wasteful number, since it uses less digits than its factorization.

800000000125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79747 (or 79737 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

It can be divided in two parts, 800000000 and 125, that multiplied together give a 11-th power (100000000000 = 10¹¹).

The spelling of 800000000125 in words is "eight hundred billion, one hundred twenty-five", and thus it is an aban number.