13087540555 has 4 divisors (see below), whose sum is σ = 15705048672. Its totient is φ = 10470032440.

The previous prime is 13087540553. The next prime is 13087540591. The reversal of 13087540555 is 55504578031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13087540555 - 2¹ = 13087540553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13087540553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308754051 + ... + 1308754060.

It is an arithmetic number, because the mean of its divisors is an integer number (3926262168).

Almost surely, 2^13087540555 is an apocalyptic number.

13087540555 is a deficient number, since it is larger than the sum of its proper divisors (2617508117).

13087540555 is an equidigital number, since it uses as much as digits as its factorization.

13087540555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617508116.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 13087540555 in words is "thirteen billion, eighty-seven million, five hundred forty thousand, five hundred fifty-five".