125661724547 has 2 divisors, whose sum is σ = 125661724548. Its totient is φ = 125661724546.

The previous prime is 125661724537. The next prime is 125661724549. The reversal of 125661724547 is 745427166521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125661724547 - 2⁸ = 125661724291 is a prime.

It is a super-2 number, since 2×125661724547² (a number of 23 digits) contains 22 as substring.

Together with 125661724549, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125661724495 and 125661724504.

It is not a weakly prime, because it can be changed into another prime (125661724549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62830862273 + 62830862274.

It is an arithmetic number, because the mean of its divisors is an integer number (62830862274).

Almost surely, 2^125661724547 is an apocalyptic number.

125661724547 is a deficient number, since it is larger than the sum of its proper divisors (1).

125661724547 is an equidigital number, since it uses as much as digits as its factorization.

125661724547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 50.

The spelling of 125661724547 in words is "one hundred twenty-five billion, six hundred sixty-one million, seven hundred twenty-four thousand, five hundred forty-seven".