13661334642 has 16 divisors (see below), whose sum is σ = 27355245120. Its totient is φ = 4548348912.

The previous prime is 13661334611. The next prime is 13661334689. The reversal of 13661334642 is 24643316631.

It is a self number, because there is not a number n which added to its sum of digits gives 13661334642.

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, 1351873 + ... + 1361940.

It is an arithmetic number, because the mean of its divisors is an integer number (1709702820).

Almost surely, 2^13661334642 is an apocalyptic number.

13661334642 is an abundant number, since it is smaller than the sum of its proper divisors (13693910478).

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

13661334642 is a wasteful number, since it uses less digits than its factorization.

13661334642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714657.

The product of its digits is 186624, while the sum is 39.

The spelling of 13661334642 in words is "thirteen billion, six hundred sixty-one million, three hundred thirty-four thousand, six hundred forty-two".