199876954245023 has 4 divisors (see below), whose sum is σ = 218047586449128. Its totient is φ = 181706322040920.

The previous prime is 199876954245019. The next prime is 199876954245037. The reversal of 199876954245023 is 320542459678991.

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 199876954245023 - 2² = 199876954245019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199876954145023) 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, 9085316102036 + ... + 9085316102057.

It is an arithmetic number, because the mean of its divisors is an integer number (54511896612282).

It is a 1-persistent number, because it is pandigital, but 2⋅199876954245023 = 399753908490046 is not.

Almost surely, 2^{199876954245023} is an apocalyptic number.

199876954245023 is a deficient number, since it is larger than the sum of its proper divisors (18170632204105).

199876954245023 is a wasteful number, since it uses less digits than its factorization.

199876954245023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18170632204104.

The product of its (nonzero) digits is 1175731200, while the sum is 74.

The spelling of 199876954245023 in words is "one hundred ninety-nine trillion, eight hundred seventy-six billion, nine hundred fifty-four million, two hundred forty-five thousand, twenty-three".