125543001015 has 48 divisors (see below), whose sum is σ = 223433997696. Its totient is φ = 65171212800.

The previous prime is 125543000977. The next prime is 125543001043. The reversal of 125543001015 is 510100345521.

125543001015 is a `hidden beast` number, since 1 + 2 + 554 + 3 + 0 + 0 + 101 + 5 = 666.

It is not a de Polignac number, because 125543001015 - 2²¹ = 125540903863 is a prime.

It is a super-2 number, since 2×125543001015² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125543001015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 716257 + ... + 874133.

It is an arithmetic number, because the mean of its divisors is an integer number (4654874952).

Almost surely, 2^125543001015 is an apocalyptic number.

125543001015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125543001015 is a deficient number, since it is larger than the sum of its proper divisors (97890996681).

125543001015 is a wasteful number, since it uses less digits than its factorization.

125543001015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158360 (or 158357 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 125543001015 its reverse (510100345521), we get a palindrome (635643346536).

The spelling of 125543001015 in words is "one hundred twenty-five billion, five hundred forty-three million, one thousand, fifteen".