521526001161 has 24 divisors (see below), whose sum is σ = 772209861472. Its totient is φ = 312817824000.

The previous prime is 521526001133. The next prime is 521526001169. The reversal of 521526001161 is 161100625125.

It is not a de Polignac number, because 521526001161 - 2¹⁵ = 521525968393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521526001169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7370515 + ... + 7440936.

Almost surely, 2^521526001161 is an apocalyptic number.

It is an amenable number.

521526001161 is a deficient number, since it is larger than the sum of its proper divisors (250683860311).

521526001161 is a wasteful number, since it uses less digits than its factorization.

521526001161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811573 (or 14811562 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 521526001161 its reverse (161100625125), we get a palindrome (682626626286).

The spelling of 521526001161 in words is "five hundred twenty-one billion, five hundred twenty-six million, one thousand, one hundred sixty-one".