191626998136 has 48 divisors (see below), whose sum is σ = 418018255200. Its totient is φ = 82114792704.

The previous prime is 191626998133. The next prime is 191626998169. The reversal of 191626998136 is 631899626191.

It is a super-2 number, since 2×191626998136² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191626998133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3313920 + ... + 3371248.

It is an arithmetic number, because the mean of its divisors is an integer number (8708713650).

Almost surely, 2^191626998136 is an apocalyptic number.

It is an amenable number.

191626998136 is an abundant number, since it is smaller than the sum of its proper divisors (226391257064).

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

191626998136 is a wasteful number, since it uses less digits than its factorization.

191626998136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65876 (or 65865 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 61.

The spelling of 191626998136 in words is "one hundred ninety-one billion, six hundred twenty-six million, nine hundred ninety-eight thousand, one hundred thirty-six".