125436581858 has 24 divisors (see below), whose sum is σ = 218991213612. Its totient is φ = 53729754624.

The previous prime is 125436581857. The next prime is 125436581869. The reversal of 125436581858 is 858185634521.

It can be written as a sum of positive squares in 2 ways, for example, as 104402010769 + 21034571089 = 323113^2 + 145033^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (125436581857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158135 + ... + 525242.

Almost surely, 2^125436581858 is an apocalyptic number.

125436581858 is a deficient number, since it is larger than the sum of its proper divisors (93554631754).

125436581858 is a wasteful number, since it uses less digits than its factorization.

125436581858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685266 (or 685259 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 56.

The spelling of 125436581858 in words is "one hundred twenty-five billion, four hundred thirty-six million, five hundred eighty-one thousand, eight hundred fifty-eight".