191954956784 has 40 divisors (see below), whose sum is σ = 373601088000. Its totient is φ = 95542200000.

The previous prime is 191954956783. The next prime is 191954956819. The reversal of 191954956784 is 487659459191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191954956783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7822967 + ... + 7847465.

It is an arithmetic number, because the mean of its divisors is an integer number (9340027200).

Almost surely, 2^191954956784 is an apocalyptic number.

It is an amenable number.

191954956784 is a deficient number, since it is larger than the sum of its proper divisors (181646131216).

191954956784 is a wasteful number, since it uses less digits than its factorization.

191954956784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26709 (or 26703 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 68.

The spelling of 191954956784 in words is "one hundred ninety-one billion, nine hundred fifty-four million, nine hundred fifty-six thousand, seven hundred eighty-four".