1171557009168 has 80 divisors (see below), whose sum is σ = 3724950504576. Its totient is φ = 308982067200.

The previous prime is 1171557009151. The next prime is 1171557009173. The reversal of 1171557009168 is 8619007551711.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1171557009168.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134102433 + ... + 134111168.

Almost surely, 2^{1171557009168} is an apocalyptic number.

It is an amenable number.

1171557009168 is an abundant number, since it is smaller than the sum of its proper divisors (2553393495408).

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

1171557009168 is a wasteful number, since it uses less digits than its factorization.

1171557009168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268213632 (or 268213626 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 51.

The spelling of 1171557009168 in words is "one trillion, one hundred seventy-one billion, five hundred fifty-seven million, nine thousand, one hundred sixty-eight".