16481861 has 4 divisors (see below), whose sum is σ = 17980224. Its totient is φ = 14983500.

The previous prime is 16481851. The next prime is 16481897. The reversal of 16481861 is 16818461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16481861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16481851) 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, 749165 + ... + 749186.

It is an arithmetic number, because the mean of its divisors is an integer number (4495056).

Almost surely, 2^16481861 is an apocalyptic number.

16481861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16481861 is a deficient number, since it is larger than the sum of its proper divisors (1498363).

16481861 is a wasteful number, since it uses less digits than its factorization.

16481861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498362.

The product of its digits is 9216, while the sum is 35.

The square root of 16481861 is about 4059.7858317897. The cubic root of 16481861 is about 254.4888440551.

The spelling of 16481861 in words is "sixteen million, four hundred eighty-one thousand, eight hundred sixty-one".