191155429090 has 16 divisors (see below), whose sum is σ = 347945838840. Its totient is φ = 75603045760.

The previous prime is 191155429057. The next prime is 191155429117. The reversal of 191155429090 is 90924551191.

191155429090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 176432761521 + 14722667569 = 420039^2 + 121337^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 191155429090.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107389801 + ... + 107391580.

Almost surely, 2^191155429090 is an apocalyptic number.

191155429090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191155429090 is a deficient number, since it is larger than the sum of its proper divisors (156790409750).

191155429090 is a wasteful number, since it uses less digits than its factorization.

191155429090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214781477.

The product of its (nonzero) digits is 145800, while the sum is 46.

The spelling of 191155429090 in words is "one hundred ninety-one billion, one hundred fifty-five million, four hundred twenty-nine thousand, ninety".