125866967761 has 4 divisors (see below), whose sum is σ = 126276958192. Its totient is φ = 125456977332.

The previous prime is 125866967747. The next prime is 125866967813. The reversal of 125866967761 is 167769668521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125866967761 - 2²⁹ = 125330096849 is a prime.

It is a super-2 number, since 2×125866967761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125866967693 and 125866967702.

It is not an unprimeable number, because it can be changed into a prime (125866967741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204994755 + ... + 204995368.

It is an arithmetic number, because the mean of its divisors is an integer number (31569239548).

Almost surely, 2^125866967761 is an apocalyptic number.

It is an amenable number.

125866967761 is a deficient number, since it is larger than the sum of its proper divisors (409990431).

125866967761 is an equidigital number, since it uses as much as digits as its factorization.

125866967761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409990430.

The product of its digits is 45722880, while the sum is 64.

The spelling of 125866967761 in words is "one hundred twenty-five billion, eight hundred sixty-six million, nine hundred sixty-seven thousand, seven hundred sixty-one".