125733741781 has 4 divisors (see below), whose sum is σ = 125811984672. Its totient is φ = 125655498892.

The previous prime is 125733741773. The next prime is 125733741827. The reversal of 125733741781 is 187147337521.

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 125733741781 - 2³ = 125733741773 is a prime.

It is a super-3 number, since 3×125733741781³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125733742781) 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 3 ways as a sum of consecutive naturals, for example, 39119035 + ... + 39122248.

It is an arithmetic number, because the mean of its divisors is an integer number (31452996168).

Almost surely, 2^125733741781 is an apocalyptic number.

It is an amenable number.

125733741781 is a deficient number, since it is larger than the sum of its proper divisors (78242891).

125733741781 is an equidigital number, since it uses as much as digits as its factorization.

125733741781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78242890.

The product of its digits is 987840, while the sum is 49.

The spelling of 125733741781 in words is "one hundred twenty-five billion, seven hundred thirty-three million, seven hundred forty-one thousand, seven hundred eighty-one".