519640045 has 8 divisors (see below), whose sum is σ = 624192120. Its totient is φ = 415296000.

The previous prime is 519640021. The next prime is 519640087. The reversal of 519640045 is 540046915.

It can be written as a sum of positive squares in 4 ways, for example, as 1713481 + 517926564 = 1309^2 + 22758^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-519640045 is a prime.

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 in 7 ways as a sum of consecutive naturals, for example, 46456 + ... + 56545.

It is an arithmetic number, because the mean of its divisors is an integer number (78024015).

Almost surely, 2^519640045 is an apocalyptic number.

It is an amenable number.

519640045 is a deficient number, since it is larger than the sum of its proper divisors (104552075).

519640045 is a wasteful number, since it uses less digits than its factorization.

519640045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104015.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 519640045 is about 22795.6146001813. The cubic root of 519640045 is about 803.9595601262.

The spelling of 519640045 in words is "five hundred nineteen million, six hundred forty thousand, forty-five".