9556897791 has 16 divisors (see below), whose sum is σ = 14901565184. Its totient is φ = 5334081984.

The previous prime is 9556897787. The next prime is 9556897807. The reversal of 9556897791 is 1977986559.

It is not a de Polignac number, because 9556897791 - 2² = 9556897787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9556897741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5290846 + ... + 5292651.

It is an arithmetic number, because the mean of its divisors is an integer number (931347824).

Almost surely, 2^9556897791 is an apocalyptic number.

9556897791 is a deficient number, since it is larger than the sum of its proper divisors (5344667393).

9556897791 is a wasteful number, since it uses less digits than its factorization.

9556897791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583550.

The product of its digits is 42865200, while the sum is 66.

The square root of 9556897791 is about 97759.3872270075. The cubic root of 9556897791 is about 2122.1316069683.

The spelling of 9556897791 in words is "nine billion, five hundred fifty-six million, eight hundred ninety-seven thousand, seven hundred ninety-one".