13040055056 has 40 divisors (see below), whose sum is σ = 29160318144. Its totient is φ = 5533257600.

The previous prime is 13040055023. The next prime is 13040055079. The reversal of 13040055056 is 65055004031.

It is a super-2 number, since 2×13040055056² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565070 + ... + 587693.

Almost surely, 2^13040055056 is an apocalyptic number.

13040055056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13040055056 is an abundant number, since it is smaller than the sum of its proper divisors (16120263088).

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

13040055056 is a wasteful number, since it uses less digits than its factorization.

13040055056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152879 (or 1152873 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 13040055056 its reverse (65055004031), we get a palindrome (78095059087).

The spelling of 13040055056 in words is "thirteen billion, forty million, fifty-five thousand, fifty-six".