191230615268 has 144 divisors (see below), whose sum is σ = 431873769600. Its totient is φ = 72480883200.

The previous prime is 191230615249. The next prime is 191230615283. The reversal of 191230615268 is 862516032191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54033443 + ... + 54036981.

It is an arithmetic number, because the mean of its divisors is an integer number (2999123400).

Almost surely, 2^191230615268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191230615268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215936884800).

191230615268 is an abundant number, since it is smaller than the sum of its proper divisors (240643154332).

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

191230615268 is a wasteful number, since it uses less digits than its factorization.

191230615268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 3989 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 191230615268 in words is "one hundred ninety-one billion, two hundred thirty million, six hundred fifteen thousand, two hundred sixty-eight".