521713251763042 has 8 divisors (see below), whose sum is σ = 782663452927056. Its totient is φ = 260825434120692.

The previous prime is 521713251763019. The next prime is 521713251763043. The reversal of 521713251763042 is 240367152317125.

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

It is not an unprimeable number, because it can be changed into a prime (521713251763043) 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, 15595859508 + ... + 15595892959.

It is an arithmetic number, because the mean of its divisors is an integer number (97832931615882).

Almost surely, 2^{521713251763042} is an apocalyptic number.

521713251763042 is a deficient number, since it is larger than the sum of its proper divisors (260950201164014).

521713251763042 is a wasteful number, since it uses less digits than its factorization.

521713251763042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31191760832.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 521713251763042 in words is "five hundred twenty-one trillion, seven hundred thirteen billion, two hundred fifty-one million, seven hundred sixty-three thousand, forty-two".