125866330261 has 8 divisors (see below), whose sum is σ = 143885450880. Its totient is φ = 107856763728.

The previous prime is 125866330253. The next prime is 125866330279. The reversal of 125866330261 is 162033668521.

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

It is not a de Polignac number, because 125866330261 - 2³ = 125866330253 is a prime.

It is a super-2 number, since 2×125866330261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125866330061) 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, 2360266 + ... + 2413003.

It is an arithmetic number, because the mean of its divisors is an integer number (17985681360).

Almost surely, 2^125866330261 is an apocalyptic number.

It is an amenable number.

125866330261 is a deficient number, since it is larger than the sum of its proper divisors (18019120619).

125866330261 is an equidigital number, since it uses as much as digits as its factorization.

125866330261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777043.

The product of its (nonzero) digits is 311040, while the sum is 43.

Adding to 125866330261 its reverse (162033668521), we get a palindrome (287899998782).

The spelling of 125866330261 in words is "one hundred twenty-five billion, eight hundred sixty-six million, three hundred thirty thousand, two hundred sixty-one".