191628825738 has 48 divisors (see below), whose sum is σ = 445892869440. Its totient is φ = 54743412864.

The previous prime is 191628825727. The next prime is 191628825743. The reversal of 191628825738 is 837528826191.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2249323 + ... + 2332961.

It is an arithmetic number, because the mean of its divisors is an integer number (9289434780).

Almost surely, 2^191628825738 is an apocalyptic number.

191628825738 is an abundant number, since it is smaller than the sum of its proper divisors (254264043702).

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

191628825738 is a wasteful number, since it uses less digits than its factorization.

191628825738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91451 (or 91444 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 60.

The spelling of 191628825738 in words is "one hundred ninety-one billion, six hundred twenty-eight million, eight hundred twenty-five thousand, seven hundred thirty-eight".