18144678078 has 32 divisors (see below), whose sum is σ = 40720741920. Its totient is φ = 5988340800.

The previous prime is 18144678077. The next prime is 18144678157. The reversal of 18144678078 is 87087644181.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144678073) 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, 1657975 + ... + 1668882.

It is an arithmetic number, because the mean of its divisors is an integer number (1272523185).

Almost surely, 2^18144678078 is an apocalyptic number.

18144678078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18144678078 is an abundant number, since it is smaller than the sum of its proper divisors (22576063842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18144678078 is a wasteful number, since it uses less digits than its factorization.

18144678078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326969 (or 3326963 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 54.

The spelling of 18144678078 in words is "eighteen billion, one hundred forty-four million, six hundred seventy-eight thousand, seventy-eight".