521161798767 has 32 divisors (see below), whose sum is σ = 705292224000. Its totient is φ = 342276285312.

The previous prime is 521161798741. The next prime is 521161798813. The reversal of 521161798767 is 767897161125.

It is not a de Polignac number, because 521161798767 - 2¹⁰ = 521161797743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521161798767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521161798067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47768109 + ... + 47779017.

It is an arithmetic number, because the mean of its divisors is an integer number (22040382000).

Almost surely, 2^521161798767 is an apocalyptic number.

521161798767 is a deficient number, since it is larger than the sum of its proper divisors (184130425233).

521161798767 is a wasteful number, since it uses less digits than its factorization.

521161798767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807.

The product of its digits is 8890560, while the sum is 60.

The spelling of 521161798767 in words is "five hundred twenty-one billion, one hundred sixty-one million, seven hundred ninety-eight thousand, seven hundred sixty-seven".