192640543894 has 4 divisors (see below), whose sum is σ = 288960815844. Its totient is φ = 96320271946.

The previous prime is 192640543871. The next prime is 192640543937. The reversal of 192640543894 is 498345046291.

192640543894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 498345046291 = 10433 ⋅47766227.

It is a super-2 number, since 2×192640543894² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 48160135972 + ... + 48160135975.

It is an arithmetic number, because the mean of its divisors is an integer number (72240203961).

Almost surely, 2^192640543894 is an apocalyptic number.

192640543894 is a deficient number, since it is larger than the sum of its proper divisors (96320271950).

192640543894 is an equidigital number, since it uses as much as digits as its factorization.

192640543894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96320271949.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 192640543894 in words is "one hundred ninety-two billion, six hundred forty million, five hundred forty-three thousand, eight hundred ninety-four".