199426604465089 has 4 divisors (see below), whose sum is σ = 199526970146224. Its totient is φ = 199326238783956.

The previous prime is 199426604465069. The next prime is 199426604465149. The reversal of 199426604465089 is 980564406624991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199426604465089 - 2⁵ = 199426604465057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199426604465069) 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, 50182837587 + ... + 50182841560.

It is an arithmetic number, because the mean of its divisors is an integer number (49881742536556).

Almost surely, 2^{199426604465089} is an apocalyptic number.

It is an amenable number.

199426604465089 is a deficient number, since it is larger than the sum of its proper divisors (100365681135).

199426604465089 is a wasteful number, since it uses less digits than its factorization.

199426604465089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100365681134.

The product of its (nonzero) digits is 806215680, while the sum is 73.

The spelling of 199426604465089 in words is "one hundred ninety-nine trillion, four hundred twenty-six billion, six hundred four million, four hundred sixty-five thousand, eighty-nine".