13791720834 has 12 divisors (see below), whose sum is σ = 29882061846. Its totient is φ = 4597240272.

The previous prime is 13791720827. The next prime is 13791720869. The reversal of 13791720834 is 43802719731.

It can be written as a sum of positive squares in only one way, i.e., 8874205209 + 4917515625 = 94203^2 + 70125^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13791720834.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 383103339 + ... + 383103374.

Almost surely, 2^13791720834 is an apocalyptic number.

13791720834 is an abundant number, since it is smaller than the sum of its proper divisors (16090341012).

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

13791720834 is a wasteful number, since it uses less digits than its factorization.

13791720834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766206721 (or 766206718 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 13791720834 in words is "thirteen billion, seven hundred ninety-one million, seven hundred twenty thousand, eight hundred thirty-four".