191901553378 has 16 divisors (see below), whose sum is σ = 299523588480. Its totient is φ = 92137395376.

The previous prime is 191901553247. The next prime is 191901553379. The reversal of 191901553378 is 873355109191.

191901553378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (191901553379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19254508 + ... + 19264471.

It is an arithmetic number, because the mean of its divisors is an integer number (18720224280).

Almost surely, 2^191901553378 is an apocalyptic number.

191901553378 is a deficient number, since it is larger than the sum of its proper divisors (107622035102).

191901553378 is a wasteful number, since it uses less digits than its factorization.

191901553378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38519081.

The product of its (nonzero) digits is 1020600, while the sum is 52.

The spelling of 191901553378 in words is "one hundred ninety-one billion, nine hundred one million, five hundred fifty-three thousand, three hundred seventy-eight".