16520427775 has 24 divisors (see below), whose sum is σ = 21252608000. Its totient is φ = 12725618400.

The previous prime is 16520427733. The next prime is 16520427799. The reversal of 16520427775 is 57772402561.

It is not a de Polignac number, because 16520427775 - 2²¹ = 16518330623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100666 + ... + 207784.

Almost surely, 2^16520427775 is an apocalyptic number.

16520427775 is a deficient number, since it is larger than the sum of its proper divisors (4732180225).

16520427775 is a wasteful number, since it uses less digits than its factorization.

16520427775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107359 (or 107354 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 16520427775 in words is "sixteen billion, five hundred twenty million, four hundred twenty-seven thousand, seven hundred seventy-five".