191077920843194 has 32 divisors (see below), whose sum is σ = 357341262736896. Its totient is φ = 74445789967920.

The previous prime is 191077920843179. The next prime is 191077920843283. The reversal of 191077920843194 is 491348029770191.

It is a super-2 number, since 2×191077920843194² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191077920843194.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99568889 + ... + 101469795.

It is an arithmetic number, because the mean of its divisors is an integer number (11166914460528).

Almost surely, 2^{191077920843194} is an apocalyptic number.

191077920843194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

191077920843194 is a deficient number, since it is larger than the sum of its proper divisors (166263341893702).

191077920843194 is a wasteful number, since it uses less digits than its factorization.

191077920843194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553650.

The product of its (nonzero) digits is 27433728, while the sum is 65.

The spelling of 191077920843194 in words is "one hundred ninety-one trillion, seventy-seven billion, nine hundred twenty million, eight hundred forty-three thousand, one hundred ninety-four".