17139890842 has 12 divisors (see below), whose sum is σ = 27134205066. Its totient is φ = 8118895320.

The previous prime is 17139890819. The next prime is 17139890897. The reversal of 17139890842 is 24809893171.

It can be written as a sum of positive squares in only one way, i.e., 12562150561 + 4577740281 = 112081^2 + 67659^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 17139890842.

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, 11869009 + ... + 11870452.

Almost surely, 2^17139890842 is an apocalyptic number.

17139890842 is a deficient number, since it is larger than the sum of its proper divisors (9994314224).

17139890842 is a wasteful number, since it uses less digits than its factorization.

17139890842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23739501 (or 23739482 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 17139890842 in words is "seventeen billion, one hundred thirty-nine million, eight hundred ninety thousand, eight hundred forty-two".