191385828892 has 12 divisors (see below), whose sum is σ = 334928778016. Its totient is φ = 95691892320.

The previous prime is 191385828871. The next prime is 191385828899. The reversal of 191385828892 is 298828583191.

It is a super-4 number, since 4×191385828892⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191385828899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299917 + ... + 687547.

Almost surely, 2^191385828892 is an apocalyptic number.

It is an amenable number.

191385828892 is a deficient number, since it is larger than the sum of its proper divisors (143542949124).

191385828892 is a wasteful number, since it uses less digits than its factorization.

191385828892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511068 (or 511066 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 64.

The spelling of 191385828892 in words is "one hundred ninety-one billion, three hundred eighty-five million, eight hundred twenty-eight thousand, eight hundred ninety-two".