16091538553476 has 45 divisors (see below), whose sum is σ = 42066649115029. Its totient is φ = 5363822115936.

The previous prime is 16091538553369. The next prime is 16091538553481. The reversal of 16091538553476 is 67435583519061.

The square root of 16091538553476 is 4011426.

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

16091538553476 is a `hidden beast` number, since 1 + 6 + 0 + 9 + 1 + 5 + 3 + 8 + 553 + 4 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8020393920900 + 8071144632576 = 2832030^2 + 2840976^2 .

It is a super-2 number, since 2×16091538553476² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 72094240 + ... + 72317096.

Almost surely, 2^{16091538553476} is an apocalyptic number.

16091538553476 is the 4011426-th square number.

It is an amenable number.

16091538553476 is an abundant number, since it is smaller than the sum of its proper divisors (25975110561553).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16091538553476 is an frugal number, since it uses more digits than its factorization.

16091538553476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445730 (or 222862 counting only the distinct ones).

The product of its (nonzero) digits is 81648000, while the sum is 63.

The spelling of 16091538553476 in words is "sixteen trillion, ninety-one billion, five hundred thirty-eight million, five hundred fifty-three thousand, four hundred seventy-six".