18136601478 has 12 divisors (see below), whose sum is σ = 39295969908. Its totient is φ = 6045533820.

The previous prime is 18136601443. The next prime is 18136601489. The reversal of 18136601478 is 87410663181.

18136601478 is a `hidden beast` number, since 1 + 8 + 1 + 36 + 601 + 4 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503794468 + ... + 503794503.

It is an arithmetic number, because the mean of its divisors is an integer number (3274664159).

Almost surely, 2^18136601478 is an apocalyptic number.

18136601478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18136601478 is an abundant number, since it is smaller than the sum of its proper divisors (21159368430).

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

18136601478 is a wasteful number, since it uses less digits than its factorization.

18136601478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007588979 (or 1007588976 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 18136601478 in words is "eighteen billion, one hundred thirty-six million, six hundred one thousand, four hundred seventy-eight".