81126619162 has 8 divisors (see below), whose sum is σ = 121737527316. Its totient is φ = 40547443392.

The previous prime is 81126619157. The next prime is 81126619163. The reversal of 81126619162 is 26191662118.

It can be written as a sum of positive squares in 2 ways, for example, as 80605455921 + 521163241 = 283911^2 + 22829^2 .

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

It is not an unprimeable number, because it can be changed into a prime (81126619163) 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, 7926703 + ... + 7936930.

Almost surely, 2^81126619162 is an apocalyptic number.

81126619162 is a deficient number, since it is larger than the sum of its proper divisors (40610908154).

81126619162 is a wasteful number, since it uses less digits than its factorization.

81126619162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866192.

The product of its digits is 62208, while the sum is 43.

The spelling of 81126619162 in words is "eighty-one billion, one hundred twenty-six million, six hundred nineteen thousand, one hundred sixty-two".