126722786091 has 32 divisors (see below), whose sum is σ = 189206316288. Its totient is φ = 74778695040.

The previous prime is 126722786087. The next prime is 126722786143. The reversal of 126722786091 is 190687227621.

It is a happy number.

It is not a de Polignac number, because 126722786091 - 2² = 126722786087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126722786041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308965 + ... + 590681.

It is an arithmetic number, because the mean of its divisors is an integer number (5912697384).

Almost surely, 2^126722786091 is an apocalyptic number.

126722786091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126722786091 is a deficient number, since it is larger than the sum of its proper divisors (62483530197).

126722786091 is a wasteful number, since it uses less digits than its factorization.

126722786091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282091.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 126722786091 in words is "one hundred twenty-six billion, seven hundred twenty-two million, seven hundred eighty-six thousand, ninety-one".