1161563026 has 12 divisors (see below), whose sum is σ = 1886681322. Its totient is φ = 536105856.

The previous prime is 1161562931. The next prime is 1161563027. The reversal of 1161563026 is 6203651611.

It can be written as a sum of positive squares in 3 ways, for example, as 304537401 + 857025625 = 17451^2 + 29275^2 .

It is not an unprimeable number, because it can be changed into a prime (1161563027) 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 5 ways as a sum of consecutive naturals, for example, 1717951 + ... + 1718626.

Almost surely, 2^1161563026 is an apocalyptic number.

1161563026 is a deficient number, since it is larger than the sum of its proper divisors (725118296).

1161563026 is a wasteful number, since it uses less digits than its factorization.

1161563026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436605 (or 3436592 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1161563026 is about 34081.7110192549. The cubic root of 1161563026 is about 1051.1892876619.

The spelling of 1161563026 in words is "one billion, one hundred sixty-one million, five hundred sixty-three thousand, twenty-six".