16447361481 has 6 divisors (see below), whose sum is σ = 23757299930. Its totient is φ = 10964907648.

The previous prime is 16447361461. The next prime is 16447361503. The reversal of 16447361481 is 18416374461.

16447361481 is a `hidden beast` number, since 1 + 6 + 44 + 73 + 61 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9032601600 + 7414759881 = 95040^2 + 86109^2 .

It is not a de Polignac number, because 16447361481 - 2⁵ = 16447361449 is a prime.

It is a super-2 number, since 2×16447361481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16447361401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 913742296 + ... + 913742313.

Almost surely, 2^16447361481 is an apocalyptic number.

It is an amenable number.

16447361481 is a deficient number, since it is larger than the sum of its proper divisors (7309938449).

16447361481 is a wasteful number, since it uses less digits than its factorization.

16447361481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827484615 (or 1827484612 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 16447361481 in words is "sixteen billion, four hundred forty-seven million, three hundred sixty-one thousand, four hundred eighty-one".