16524845401 has 3 divisors (see below), whose sum is σ = 16524973951. Its totient is φ = 16524716852.

The previous prime is 16524845387. The next prime is 16524845417. The reversal of 16524845401 is 10454842561.

The square root of 16524845401 is 128549.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12595401 + 16512250000 = 3549^2 + 128500^2 .

It is not a de Polignac number, because 16524845401 - 2²³ = 16516456793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16524845101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64275 + ... + 192823.

Almost surely, 2^16524845401 is an apocalyptic number.

16524845401 is the 128549-th square number.

16524845401 is the 64275-th centered octagonal number.

It is an amenable number.

16524845401 is a deficient number, since it is larger than the sum of its proper divisors (128550).

16524845401 is an frugal number, since it uses more digits than its factorization.

16524845401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257098 (or 128549 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 16524845401 in words is "sixteen billion, five hundred twenty-four million, eight hundred forty-five thousand, four hundred one".