511668494 has 8 divisors (see below), whose sum is σ = 771399288. Its totient is φ = 254535400.

The previous prime is 511668491. The next prime is 511668517. The reversal of 511668494 is 494866115.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511668491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648932 + ... + 649719.

It is an arithmetic number, because the mean of its divisors is an integer number (96424911).

Almost surely, 2^511668494 is an apocalyptic number.

511668494 is a deficient number, since it is larger than the sum of its proper divisors (259730794).

511668494 is a wasteful number, since it uses less digits than its factorization.

511668494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298850.

The product of its digits is 207360, while the sum is 44.

The square root of 511668494 is about 22620.0904949560. The cubic root of 511668494 is about 799.8273033475.

The spelling of 511668494 in words is "five hundred eleven million, six hundred sixty-eight thousand, four hundred ninety-four".