842400191867 has 16 divisors (see below), whose sum is σ = 907920078912. Its totient is φ = 776983449600.

The previous prime is 842400191791. The next prime is 842400191947. The reversal of 842400191867 is 768191004248.

It is a cyclic number.

It is not a de Polignac number, because 842400191867 - 2¹⁶ = 842400126331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842400191167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143825003 + ... + 143830859.

It is an arithmetic number, because the mean of its divisors is an integer number (56745004932).

Almost surely, 2^842400191867 is an apocalyptic number.

842400191867 is a deficient number, since it is larger than the sum of its proper divisors (65519887045).

842400191867 is a wasteful number, since it uses less digits than its factorization.

842400191867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12758.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 842400191867 in words is "eight hundred forty-two billion, four hundred million, one hundred ninety-one thousand, eight hundred sixty-seven".