861423119899 has 4 divisors (see below), whose sum is σ = 861474926536. Its totient is φ = 861371313264.

The previous prime is 861423119849. The next prime is 861423119923. The reversal of 861423119899 is 998911324168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 861423119899 - 2⁹ = 861423119387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861423119839) 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, 25878369 + ... + 25911634.

It is an arithmetic number, because the mean of its divisors is an integer number (215368731634).

Almost surely, 2^861423119899 is an apocalyptic number.

861423119899 is a deficient number, since it is larger than the sum of its proper divisors (51806637).

861423119899 is a wasteful number, since it uses less digits than its factorization.

861423119899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51806636.

The product of its digits is 6718464, while the sum is 61.

The spelling of 861423119899 in words is "eight hundred sixty-one billion, four hundred twenty-three million, one hundred nineteen thousand, eight hundred ninety-nine".