196126951581 has 24 divisors (see below), whose sum is σ = 309063104064. Its totient is φ = 118859213760.

The previous prime is 196126951543. The next prime is 196126951597. The reversal of 196126951581 is 185159621691.

It is a happy number.

196126951581 is a `hidden beast` number, since 1 + 9 + 6 + 1 + 2 + 6 + 9 + 51 + 581 = 666.

196126951581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 196126951581 - 2¹⁰ = 196126950557 is a prime.

It is a super-2 number, since 2×196126951581² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196126951081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3190720 + ... + 3251606.

It is an arithmetic number, because the mean of its divisors is an integer number (12877629336).

Almost surely, 2^196126951581 is an apocalyptic number.

196126951581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

196126951581 is a deficient number, since it is larger than the sum of its proper divisors (112936152483).

196126951581 is a wasteful number, since it uses less digits than its factorization.

196126951581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93441 (or 93438 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 54.

The spelling of 196126951581 in words is "one hundred ninety-six billion, one hundred twenty-six million, nine hundred fifty-one thousand, five hundred eighty-one".