199426604465087 has 8 divisors (see below), whose sum is σ = 199891294310400. Its totient is φ = 198961961962104.

The previous prime is 199426604465069. The next prime is 199426604465149. The reversal of 199426604465087 is 780564406624991.

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

It is a cyclic number.

It is not a de Polignac number, because 199426604465087 - 2²⁰ = 199426603416511 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 199426604465087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199426604465057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3393887 + ... + 20257632.

It is an arithmetic number, because the mean of its divisors is an integer number (24986411788800).

Almost surely, 2^{199426604465087} is an apocalyptic number.

199426604465087 is a deficient number, since it is larger than the sum of its proper divisors (464689845313).

199426604465087 is a wasteful number, since it uses less digits than its factorization.

199426604465087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23671165.

The product of its (nonzero) digits is 627056640, while the sum is 71.

The spelling of 199426604465087 in words is "one hundred ninety-nine trillion, four hundred twenty-six billion, six hundred four million, four hundred sixty-five thousand, eighty-seven".