125815051563 has 16 divisors (see below), whose sum is σ = 172476535296. Its totient is φ = 81520115040.

The previous prime is 125815051553. The next prime is 125815051591. The reversal of 125815051563 is 365150518521.

It is not a de Polignac number, because 125815051563 - 2⁴ = 125815051547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125815051543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520981 + ... + 723222.

It is an arithmetic number, because the mean of its divisors is an integer number (10779783456).

Almost surely, 2^125815051563 is an apocalyptic number.

125815051563 is a deficient number, since it is larger than the sum of its proper divisors (46661483733).

125815051563 is a wasteful number, since it uses less digits than its factorization.

125815051563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245154.

The product of its (nonzero) digits is 180000, while the sum is 42.

The spelling of 125815051563 in words is "one hundred twenty-five billion, eight hundred fifteen million, fifty-one thousand, five hundred sixty-three".