125503645545 has 96 divisors (see below), whose sum is σ = 240634727424. Its totient is φ = 60230246400.

The previous prime is 125503645529. The next prime is 125503645549. The reversal of 125503645545 is 545546305521.

125503645545 is a `hidden beast` number, since 1 + 2 + 550 + 3 + 6 + 4 + 55 + 45 = 666.

It is not a de Polignac number, because 125503645545 - 2⁴ = 125503645529 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 125503645545.

It is not an unprimeable number, because it can be changed into a prime (125503645549) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1936465 + ... + 2000225.

It is an arithmetic number, because the mean of its divisors is an integer number (2506611744).

Almost surely, 2^125503645545 is an apocalyptic number.

125503645545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125503645545 is a deficient number, since it is larger than the sum of its proper divisors (115131081879).

125503645545 is a wasteful number, since it uses less digits than its factorization.

125503645545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63903 (or 63900 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 125503645545 in words is "one hundred twenty-five billion, five hundred three million, six hundred forty-five thousand, five hundred forty-five".