125815051404 has 72 divisors (see below), whose sum is σ = 371918426880. Its totient is φ = 35111174112.

The previous prime is 125815051399. The next prime is 125815051433. The reversal of 125815051404 is 404150518521.

125815051404 is a `hidden beast` number, since 1 + 2 + 5 + 8 + 1 + 505 + 140 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 5794584 + ... + 5816255.

Almost surely, 2^125815051404 is an apocalyptic number.

125815051404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

125815051404 is an abundant number, since it is smaller than the sum of its proper divisors (246103375476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125815051404 is a wasteful number, since it uses less digits than its factorization.

125815051404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11610899 (or 11610894 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

Adding to 125815051404 its reverse (404150518521), we get a palindrome (529965569925).

The spelling of 125815051404 in words is "one hundred twenty-five billion, eight hundred fifteen million, fifty-one thousand, four hundred four".