191148250988 has 24 divisors (see below), whose sum is σ = 354691812384. Its totient is φ = 89823776000.

The previous prime is 191148250987. The next prime is 191148251023. The reversal of 191148250988 is 889052841191.

It is a super-2 number, since 2×191148250988² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191148250981) 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, 1957328 + ... + 2052663.

It is an arithmetic number, because the mean of its divisors is an integer number (14778825516).

Almost surely, 2^191148250988 is an apocalyptic number.

It is an amenable number.

191148250988 is a deficient number, since it is larger than the sum of its proper divisors (163543561396).

191148250988 is a wasteful number, since it uses less digits than its factorization.

191148250988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010713 (or 4010711 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 56.

The spelling of 191148250988 in words is "one hundred ninety-one billion, one hundred forty-eight million, two hundred fifty thousand, nine hundred eighty-eight".