191156681292 has 24 divisors (see below), whose sum is σ = 450630529776. Its totient is φ = 63061997568.

The previous prime is 191156681263. The next prime is 191156681293. The reversal of 191156681292 is 292186651191.

It is not an unprimeable number, because it can be changed into a prime (191156681293) 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, 82110813 + ... + 82113140.

It is an arithmetic number, because the mean of its divisors is an integer number (18776272074).

Almost surely, 2^191156681292 is an apocalyptic number.

191156681292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191156681292 is an abundant number, since it is smaller than the sum of its proper divisors (259473848484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191156681292 is a wasteful number, since it uses less digits than its factorization.

191156681292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164224057 (or 164224055 counting only the distinct ones).

The product of its digits is 466560, while the sum is 51.

The spelling of 191156681292 in words is "one hundred ninety-one billion, one hundred fifty-six million, six hundred eighty-one thousand, two hundred ninety-two".