199170142766 has 32 divisors (see below), whose sum is σ = 353068968960. Its totient is φ = 82498100256.

The previous prime is 199170142751. The next prime is 199170142771. The reversal of 199170142766 is 667241071991.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1953446 + ... + 2052873.

It is an arithmetic number, because the mean of its divisors is an integer number (11033405280).

Almost surely, 2^199170142766 is an apocalyptic number.

199170142766 is a deficient number, since it is larger than the sum of its proper divisors (153898826194).

199170142766 is a wasteful number, since it uses less digits than its factorization.

199170142766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006448.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 199170142766 in words is "one hundred ninety-nine billion, one hundred seventy million, one hundred forty-two thousand, seven hundred sixty-six".