191213118208 has 72 divisors (see below), whose sum is σ = 439640133632. Its totient is φ = 81303118848.

The previous prime is 191213118197. The next prime is 191213118221. The reversal of 191213118208 is 802811312191.

It is a super-2 number, since 2×191213118208² (a number of 23 digits) contains 22 as substring.

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, 192510 + ... + 647677.

Almost surely, 2^191213118208 is an apocalyptic number.

It is an amenable number.

191213118208 is an abundant number, since it is smaller than the sum of its proper divisors (248427015424).

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

191213118208 is an equidigital number, since it uses as much as digits as its factorization.

191213118208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840337 (or 840323 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 37.

The spelling of 191213118208 in words is "one hundred ninety-one billion, two hundred thirteen million, one hundred eighteen thousand, two hundred eight".