491768258354 has 4 divisors (see below), whose sum is σ = 737652387534. Its totient is φ = 245884129176.

The previous prime is 491768258279. The next prime is 491768258419. The reversal of 491768258354 is 453852867194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 333223335025 + 158544923329 = 577255^2 + 398177^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 122942064587 + ... + 122942064590.

Almost surely, 2^491768258354 is an apocalyptic number.

491768258354 is a deficient number, since it is larger than the sum of its proper divisors (245884129180).

491768258354 is a wasteful number, since it uses less digits than its factorization.

491768258354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245884129179.

The product of its digits is 58060800, while the sum is 62.

The spelling of 491768258354 in words is "four hundred ninety-one billion, seven hundred sixty-eight million, two hundred fifty-eight thousand, three hundred fifty-four".