16023491781 has 16 divisors (see below), whose sum is σ = 23311299648. Its totient is φ = 9709372800.

The previous prime is 16023491777. The next prime is 16023491801. The reversal of 16023491781 is 18719432061.

It is a happy number.

16023491781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16023491781 - 2² = 16023491777 is a prime.

It is a super-2 number, since 2×16023491781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16023491681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143115 + ... + 229191.

It is an arithmetic number, because the mean of its divisors is an integer number (1456956228).

Almost surely, 2^16023491781 is an apocalyptic number.

16023491781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16023491781 is a deficient number, since it is larger than the sum of its proper divisors (7287807867).

16023491781 is a wasteful number, since it uses less digits than its factorization.

16023491781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91732.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 16023491781 in words is "sixteen billion, twenty-three million, four hundred ninety-one thousand, seven hundred eighty-one".