125661724545 has 16 divisors (see below), whose sum is σ = 229781439360. Its totient is φ = 57445359744.

The previous prime is 125661724537. The next prime is 125661724547. The reversal of 125661724545 is 545427166521.

It is not a de Polignac number, because 125661724545 - 2³ = 125661724537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125661724494 and 125661724503.

It is not an unprimeable number, because it can be changed into a prime (125661724547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598389060 + ... + 598389269.

It is an arithmetic number, because the mean of its divisors is an integer number (14361339960).

Almost surely, 2^125661724545 is an apocalyptic number.

125661724545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125661724545 is a deficient number, since it is larger than the sum of its proper divisors (104119714815).

125661724545 is a wasteful number, since it uses less digits than its factorization.

125661724545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196778344.

The product of its digits is 2016000, while the sum is 48.

The spelling of 125661724545 in words is "one hundred twenty-five billion, six hundred sixty-one million, seven hundred twenty-four thousand, five hundred forty-five".