125556214545 has 24 divisors (see below), whose sum is σ = 217925323200. Its totient is φ = 66872683296.

The previous prime is 125556214529. The next prime is 125556214583. The reversal of 125556214545 is 545412655521.

It is a happy number.

125556214545 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 562 + 1 + 45 + 45 = 666.

It is not a de Polignac number, because 125556214545 - 2⁴ = 125556214529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 125556214545.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1854525 + ... + 1921034.

It is an arithmetic number, because the mean of its divisors is an integer number (9080221800).

Almost surely, 2^125556214545 is an apocalyptic number.

125556214545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125556214545 is a deficient number, since it is larger than the sum of its proper divisors (92369108655).

125556214545 is a wasteful number, since it uses less digits than its factorization.

125556214545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776309 (or 3776306 counting only the distinct ones).

The product of its digits is 1200000, while the sum is 45.

The spelling of 125556214545 in words is "one hundred twenty-five billion, five hundred fifty-six million, two hundred fourteen thousand, five hundred forty-five".