13508778722 has 8 divisors (see below), whose sum is σ = 20273112000. Its totient is φ = 6751074724.

The previous prime is 13508778691. The next prime is 13508778727. The reversal of 13508778722 is 22787780531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13508778727) 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, 1652222 + ... + 1660377.

It is an arithmetic number, because the mean of its divisors is an integer number (2534139000).

Almost surely, 2^13508778722 is an apocalyptic number.

13508778722 is a deficient number, since it is larger than the sum of its proper divisors (6764333278).

13508778722 is a wasteful number, since it uses less digits than its factorization.

13508778722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314640.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 13508778722 in words is "thirteen billion, five hundred eight million, seven hundred seventy-eight thousand, seven hundred twenty-two".