16091554 has 16 divisors (see below), whose sum is σ = 25654968. Its totient is φ = 7543552.

The previous prime is 16091533. The next prime is 16091597. The reversal of 16091554 is 45519061.

16091554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14615329 + 1476225 = 3823^2 + 1215^2 .

It is a super-2 number, since 2×16091554² = 517876220269832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10032 + ... + 11524.

Almost surely, 2^16091554 is an apocalyptic number.

16091554 is a deficient number, since it is larger than the sum of its proper divisors (9563414).

16091554 is a wasteful number, since it uses less digits than its factorization.

16091554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 16091554 is about 4011.4279253154. The cubic root of 16091554 is about 252.4639245261.

The spelling of 16091554 in words is "sixteen million, ninety-one thousand, five hundred fifty-four".