13556990776 has 16 divisors (see below), whose sum is σ = 29050694640. Its totient is φ = 5810138880.

The previous prime is 13556990747. The next prime is 13556990779. The reversal of 13556990776 is 67709965531.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13556990776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13556990779) 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, 121044505 + ... + 121044616.

It is an arithmetic number, because the mean of its divisors is an integer number (1815668415).

Almost surely, 2^13556990776 is an apocalyptic number.

It is an amenable number.

13556990776 is an abundant number, since it is smaller than the sum of its proper divisors (15493703864).

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

13556990776 is a wasteful number, since it uses less digits than its factorization.

13556990776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242089134 (or 242089130 counting only the distinct ones).

The product of its (nonzero) digits is 10716300, while the sum is 58.

The spelling of 13556990776 in words is "thirteen billion, five hundred fifty-six million, nine hundred ninety thousand, seven hundred seventy-six".