125905418722 has 8 divisors (see below), whose sum is σ = 189011799900. Its totient is φ = 62901485424.

The previous prime is 125905418707. The next prime is 125905418741. The reversal of 125905418722 is 227814509521.

It can be written as a sum of positive squares in 2 ways, for example, as 91197356121 + 34708062601 = 301989^2 + 186301^2 .

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

It is a super-2 number, since 2×125905418722² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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, 25608897 + ... + 25613812.

Almost surely, 2^125905418722 is an apocalyptic number.

125905418722 is a deficient number, since it is larger than the sum of its proper divisors (63106381178).

125905418722 is a wasteful number, since it uses less digits than its factorization.

125905418722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51223940.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 125905418722 in words is "one hundred twenty-five billion, nine hundred five million, four hundred eighteen thousand, seven hundred twenty-two".