16532261421 has 32 divisors (see below), whose sum is σ = 24265059840. Its totient is φ = 9948470784.

The previous prime is 16532261387. The next prime is 16532261443. The reversal of 16532261421 is 12416223561.

It is not a de Polignac number, because 16532261421 - 2¹⁵ = 16532228653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16532261461) 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, 2513425 + ... + 2519993.

It is an arithmetic number, because the mean of its divisors is an integer number (758283120).

Almost surely, 2^16532261421 is an apocalyptic number.

It is an amenable number.

16532261421 is a deficient number, since it is larger than the sum of its proper divisors (7732798419).

16532261421 is a wasteful number, since it uses less digits than its factorization.

16532261421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8005.

The product of its digits is 17280, while the sum is 33.

Adding to 16532261421 its reverse (12416223561), we get a palindrome (28948484982).

The spelling of 16532261421 in words is "sixteen billion, five hundred thirty-two million, two hundred sixty-one thousand, four hundred twenty-one".