16461553 has 4 divisors (see below), whose sum is σ = 16475508. Its totient is φ = 16447600.

The previous prime is 16461547. The next prime is 16461659. The reversal of 16461553 is 35516461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 16418704 = 207^2 + 4052^2 .

It is a cyclic number.

It is not a de Polignac number, because 16461553 - 2¹³ = 16453361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16461503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5026 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (4118877).

Almost surely, 2^16461553 is an apocalyptic number.

It is an amenable number.

16461553 is a deficient number, since it is larger than the sum of its proper divisors (13955).

16461553 is a wasteful number, since it uses less digits than its factorization.

16461553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13954.

The product of its digits is 10800, while the sum is 31.

The square root of 16461553 is about 4057.2839437239. The cubic root of 16461553 is about 254.3842789307.

The spelling of 16461553 in words is "sixteen million, four hundred sixty-one thousand, five hundred fifty-three".