1171591672 has 8 divisors (see below), whose sum is σ = 2196734400. Its totient is φ = 585795832.

The previous prime is 1171591667. The next prime is 1171591679. The reversal of 1171591672 is 2761951711.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171591679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73224472 + ... + 73224487.

It is an arithmetic number, because the mean of its divisors is an integer number (274591800).

Almost surely, 2^1171591672 is an apocalyptic number.

It is an amenable number.

1171591672 is a deficient number, since it is larger than the sum of its proper divisors (1025142728).

1171591672 is a wasteful number, since it uses less digits than its factorization.

1171591672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146448965 (or 146448961 counting only the distinct ones).

The product of its digits is 26460, while the sum is 40.

The square root of 1171591672 is about 34228.5213235980. The cubic root of 1171591672 is about 1054.2058583467.

The spelling of 1171591672 in words is "one billion, one hundred seventy-one million, five hundred ninety-one thousand, six hundred seventy-two".