126685875861 has 12 divisors (see below), whose sum is σ = 185497432588. Its totient is φ = 83300301504.

The previous prime is 126685875803. The next prime is 126685875887. The reversal of 126685875861 is 168578586621.

It can be written as a sum of positive squares in 2 ways, for example, as 85904092836 + 40781783025 = 293094^2 + 201945^2 .

It is not a de Polignac number, because 126685875861 - 2¹¹ = 126685873813 is a prime.

It is a super-2 number, since 2×126685875861² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126685875161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96411730 + ... + 96413043.

Almost surely, 2^126685875861 is an apocalyptic number.

It is an amenable number.

126685875861 is a deficient number, since it is larger than the sum of its proper divisors (58811556727).

126685875861 is a wasteful number, since it uses less digits than its factorization.

126685875861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192824852 (or 192824849 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 63.

The spelling of 126685875861 in words is "one hundred twenty-six billion, six hundred eighty-five million, eight hundred seventy-five thousand, eight hundred sixty-one".