16545641 has 16 divisors (see below), whose sum is σ = 20168064. Its totient is φ = 13250304.

The previous prime is 16545629. The next prime is 16545643. The reversal of 16545641 is 14654561.

It is a cyclic number.

It is not a de Polignac number, because 16545641 - 2⁶ = 16545577 is a prime.

It is a super-2 number, since 2×16545641² = 547516472201762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16545598 and 16545607.

It is not an unprimeable number, because it can be changed into a prime (16545643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18971 + ... + 19823.

It is an arithmetic number, because the mean of its divisors is an integer number (1260504).

Almost surely, 2^16545641 is an apocalyptic number.

It is an amenable number.

16545641 is a deficient number, since it is larger than the sum of its proper divisors (3622423).

16545641 is a wasteful number, since it uses less digits than its factorization.

16545641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its digits is 14400, while the sum is 32.

The square root of 16545641 is about 4067.6333413915. The cubic root of 16545641 is about 254.8166874253.

The spelling of 16545641 in words is "sixteen million, five hundred forty-five thousand, six hundred forty-one".