16065483781 has 4 divisors (see below), whose sum is σ = 16066655200. Its totient is φ = 16064312364.

The previous prime is 16065483773. The next prime is 16065483787. The reversal of 16065483781 is 18738456061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18738456061 = 13 ⋅1441419697.

It is a cyclic number.

It is not a de Polignac number, because 16065483781 - 2³ = 16065483773 is a prime.

It is a super-2 number, since 2×16065483781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16065483787) 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, 564891 + ... + 592648.

It is an arithmetic number, because the mean of its divisors is an integer number (4016663800).

Almost surely, 2^16065483781 is an apocalyptic number.

It is an amenable number.

16065483781 is a deficient number, since it is larger than the sum of its proper divisors (1171419).

16065483781 is a wasteful number, since it uses less digits than its factorization.

16065483781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171418.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 16065483781 in words is "sixteen billion, sixty-five million, four hundred eighty-three thousand, seven hundred eighty-one".