1161572878 has 16 divisors (see below), whose sum is σ = 1761847200. Its totient is φ = 574314496.

The previous prime is 1161572869. The next prime is 1161572879. The reversal of 1161572878 is 8782751611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161572879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95751 + ... + 107197.

It is an arithmetic number, because the mean of its divisors is an integer number (110115450).

Almost surely, 2^1161572878 is an apocalyptic number.

1161572878 is a deficient number, since it is larger than the sum of its proper divisors (600274322).

1161572878 is a wasteful number, since it uses less digits than its factorization.

1161572878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011.

The product of its digits is 188160, while the sum is 46.

The square root of 1161572878 is about 34081.8555539454. The cubic root of 1161572878 is about 1051.1922596021.

The spelling of 1161572878 in words is "one billion, one hundred sixty-one million, five hundred seventy-two thousand, eight hundred seventy-eight".