521125160091 has 8 divisors (see below), whose sum is σ = 694919435280. Its totient is φ = 347373829152.

The previous prime is 521125160033. The next prime is 521125160113. The reversal of 521125160091 is 190061521125.

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

It is not a de Polignac number, because 521125160091 - 2⁷ = 521125159963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521125170091) 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 7 ways as a sum of consecutive naturals, for example, 10707736 + ... + 10756293.

It is an arithmetic number, because the mean of its divisors is an integer number (86864929410).

Almost surely, 2^521125160091 is an apocalyptic number.

521125160091 is a deficient number, since it is larger than the sum of its proper divisors (173794275189).

521125160091 is a wasteful number, since it uses less digits than its factorization.

521125160091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21472125.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 521125160091 in words is "five hundred twenty-one billion, one hundred twenty-five million, one hundred sixty thousand, ninety-one".