191458418081 has 16 divisors (see below), whose sum is σ = 228348134400. Its totient is φ = 156954896208.

The previous prime is 191458418077. The next prime is 191458418101. The reversal of 191458418081 is 180814854191.

It is a cyclic number.

It is not a de Polignac number, because 191458418081 - 2² = 191458418077 is a prime.

It is a super-2 number, since 2×191458418081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191458418071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1526990 + ... + 1647608.

It is an arithmetic number, because the mean of its divisors is an integer number (14271758400).

Almost surely, 2^191458418081 is an apocalyptic number.

It is an amenable number.

191458418081 is a deficient number, since it is larger than the sum of its proper divisors (36889716319).

191458418081 is a wasteful number, since it uses less digits than its factorization.

191458418081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130508.

The product of its (nonzero) digits is 368640, while the sum is 50.

The spelling of 191458418081 in words is "one hundred ninety-one billion, four hundred fifty-eight million, four hundred eighteen thousand, eighty-one".