18232761616 has 20 divisors (see below), whose sum is σ = 36147511312. Its totient is φ = 8904371616.

The previous prime is 18232761601. The next prime is 18232761637. The reversal of 18232761616 is 61616723281.

It is a super-2 number, since 2×18232761616² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13249866 + ... + 13251241.

Almost surely, 2^18232761616 is an apocalyptic number.

18232761616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18232761616 is a deficient number, since it is larger than the sum of its proper divisors (17914749696).

18232761616 is a wasteful number, since it uses less digits than its factorization.

18232761616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26501158 (or 26501152 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The spelling of 18232761616 in words is "eighteen billion, two hundred thirty-two million, seven hundred sixty-one thousand, six hundred sixteen".