14638993278 has 64 divisors (see below), whose sum is σ = 36247895040. Its totient is φ = 3860809056.

The previous prime is 14638993253. The next prime is 14638993307. The reversal of 14638993278 is 87239983641.

It is a super-3 number, since 3×14638993278³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12951 + ... + 171597.

It is an arithmetic number, because the mean of its divisors is an integer number (566373360).

Almost surely, 2^14638993278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14638993278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18123947520).

14638993278 is an abundant number, since it is smaller than the sum of its proper divisors (21608901762).

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

14638993278 is a wasteful number, since it uses less digits than its factorization.

14638993278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158698 (or 158672 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The spelling of 14638993278 in words is "fourteen billion, six hundred thirty-eight million, nine hundred ninety-three thousand, two hundred seventy-eight".