125766436643 has 8 divisors (see below), whose sum is σ = 133385930016. Its totient is φ = 118326225600.

The previous prime is 125766436639. The next prime is 125766436687. The reversal of 125766436643 is 346634667521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125766436643 - 2² = 125766436639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125766436843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44819138 + ... + 44821943.

It is an arithmetic number, because the mean of its divisors is an integer number (16673241252).

Almost surely, 2^125766436643 is an apocalyptic number.

125766436643 is a deficient number, since it is larger than the sum of its proper divisors (7619493373).

125766436643 is an equidigital number, since it uses as much as digits as its factorization.

125766436643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89641165.

The product of its digits is 13063680, while the sum is 53.

The spelling of 125766436643 in words is "one hundred twenty-five billion, seven hundred sixty-six million, four hundred thirty-six thousand, six hundred forty-three".