18180381516519 has 16 divisors (see below), whose sum is σ = 24320426104800. Its totient is φ = 12080353259520.

The previous prime is 18180381516499. The next prime is 18180381516551. The reversal of 18180381516519 is 91561518308181.

It is not a de Polignac number, because 18180381516519 - 2⁵ = 18180381516487 is a prime.

It is a super-2 number, since 2×18180381516519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18180381516599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5940072 + ... + 8464349.

It is an arithmetic number, because the mean of its divisors is an integer number (1520026631550).

Almost surely, 2^{18180381516519} is an apocalyptic number.

18180381516519 is a deficient number, since it is larger than the sum of its proper divisors (6140044588281).

18180381516519 is a wasteful number, since it uses less digits than its factorization.

18180381516519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14405810.

The product of its (nonzero) digits is 2073600, while the sum is 57.

The spelling of 18180381516519 in words is "eighteen trillion, one hundred eighty billion, three hundred eighty-one million, five hundred sixteen thousand, five hundred nineteen".