190647426479 has 4 divisors (see below), whose sum is σ = 190666107480. Its totient is φ = 190628745480.

The previous prime is 190647426469. The next prime is 190647426509. The reversal of 190647426479 is 974624746091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974624746091 = 11903 ⋅81880597.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190647426479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190647426469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9325184 + ... + 9345605.

It is an arithmetic number, because the mean of its divisors is an integer number (47666526870).

Almost surely, 2^190647426479 is an apocalyptic number.

190647426479 is a deficient number, since it is larger than the sum of its proper divisors (18681001).

190647426479 is a wasteful number, since it uses less digits than its factorization.

190647426479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18681000.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 190647426479 in words is "one hundred ninety billion, six hundred forty-seven million, four hundred twenty-six thousand, four hundred seventy-nine".