190511947947 has 8 divisors (see below), whose sum is σ = 259420525056. Its totient is φ = 124305668072.

The previous prime is 190511947909. The next prime is 190511948023. The reversal of 190511947947 is 749749115091.

190511947947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 190511947947 - 2¹² = 190511943851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190511947147) 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, 675574143 + ... + 675574424.

It is an arithmetic number, because the mean of its divisors is an integer number (32427565632).

Almost surely, 2^190511947947 is an apocalyptic number.

190511947947 is a deficient number, since it is larger than the sum of its proper divisors (68908577109).

190511947947 is a wasteful number, since it uses less digits than its factorization.

190511947947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351148617.

The product of its (nonzero) digits is 2857680, while the sum is 57.

The spelling of 190511947947 in words is "one hundred ninety billion, five hundred eleven million, nine hundred forty-seven thousand, nine hundred forty-seven".