126081005851 has 4 divisors (see below), whose sum is σ = 130148135104. Its totient is φ = 122013876600.

The previous prime is 126081005837. The next prime is 126081005857. The reversal of 126081005851 is 158500180621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158500180621 = 2113 ⋅75011917.

It is a cyclic number.

It is not a de Polignac number, because 126081005851 - 2¹⁷ = 126080874779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126081005851.

It is not an unprimeable number, because it can be changed into a prime (126081005857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033564580 + ... + 2033564641.

It is an arithmetic number, because the mean of its divisors is an integer number (32537033776).

Almost surely, 2^126081005851 is an apocalyptic number.

126081005851 is a deficient number, since it is larger than the sum of its proper divisors (4067129253).

126081005851 is an equidigital number, since it uses as much as digits as its factorization.

126081005851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067129252.

The product of its (nonzero) digits is 19200, while the sum is 37.

The spelling of 126081005851 in words is "one hundred twenty-six billion, eighty-one million, five thousand, eight hundred fifty-one".