13263378555 has 48 divisors (see below), whose sum is σ = 24698610720. Its totient is φ = 6060192768.

The previous prime is 13263378553. The next prime is 13263378577. The reversal of 13263378555 is 55587336231.

It is not a de Polignac number, because 13263378555 - 2¹ = 13263378553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13263378553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2126181 + ... + 2132409.

It is an arithmetic number, because the mean of its divisors is an integer number (514554390).

Almost surely, 2^13263378555 is an apocalyptic number.

13263378555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13263378555 is a deficient number, since it is larger than the sum of its proper divisors (11435232165).

13263378555 is a wasteful number, since it uses less digits than its factorization.

13263378555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9148 (or 9141 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 48.

The spelling of 13263378555 in words is "thirteen billion, two hundred sixty-three million, three hundred seventy-eight thousand, five hundred fifty-five".