513640494 has 32 divisors (see below), whose sum is σ = 1142324640. Its totient is φ = 171078336.

The previous prime is 513640493. The next prime is 513640507. The reversal of 513640494 is 494046315.

513640494 is a `hidden beast` number, since 5 + 1 + 3 + 640 + 4 + 9 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513640493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84154 + ... + 90050.

It is an arithmetic number, because the mean of its divisors is an integer number (35697645).

Almost surely, 2^513640494 is an apocalyptic number.

513640494 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

513640494 is an abundant number, since it is smaller than the sum of its proper divisors (628684146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513640494 is a wasteful number, since it uses less digits than its factorization.

513640494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521 (or 7515 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 513640494 is about 22663.6381457170. The cubic root of 513640494 is about 800.8535130289.

The spelling of 513640494 in words is "five hundred thirteen million, six hundred forty thousand, four hundred ninety-four".