16609337481 has 64 divisors (see below), whose sum is σ = 25343020800. Its totient is φ = 9586252800.

The previous prime is 16609337477. The next prime is 16609337491. The reversal of 16609337481 is 18473390661.

It is a happy number.

It is not a de Polignac number, because 16609337481 - 2² = 16609337477 is a prime.

It is a super-2 number, since 2×16609337481² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16609337481.

It is not an unprimeable number, because it can be changed into a prime (16609337491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20034975 + ... + 20035803.

It is an arithmetic number, because the mean of its divisors is an integer number (395984700).

Almost surely, 2^16609337481 is an apocalyptic number.

16609337481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16609337481 is a deficient number, since it is larger than the sum of its proper divisors (8733683319).

16609337481 is a wasteful number, since it uses less digits than its factorization.

16609337481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 16609337481 in words is "sixteen billion, six hundred nine million, three hundred thirty-seven thousand, four hundred eighty-one".