125641165291 has 8 divisors (see below), whose sum is σ = 127522789520. Its totient is φ = 123759728928.

The previous prime is 125641165289. The next prime is 125641165439. The reversal of 125641165291 is 192561146521.

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 125641165291 - 2¹ = 125641165289 is a prime.

It is a super-2 number, since 2×125641165291² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125641165201) 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 7 ways as a sum of consecutive naturals, for example, 1899565 + ... + 1964593.

It is an arithmetic number, because the mean of its divisors is an integer number (15940348690).

Almost surely, 2^125641165291 is an apocalyptic number.

125641165291 is a deficient number, since it is larger than the sum of its proper divisors (1881624229).

125641165291 is an equidigital number, since it uses as much as digits as its factorization.

125641165291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93933.

The product of its digits is 129600, while the sum is 43.

The spelling of 125641165291 in words is "one hundred twenty-five billion, six hundred forty-one million, one hundred sixty-five thousand, two hundred ninety-one".