1161610256 has 20 divisors (see below), whose sum is σ = 2302961232. Its totient is φ = 567297696.

The previous prime is 1161610253. The next prime is 1161610267. The reversal of 1161610256 is 6520161611.

1161610256 = 141² + 142² + ... + 1516².

It is not an unprimeable number, because it can be changed into a prime (1161610253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843506 + ... + 844881.

Almost surely, 2^1161610256 is an apocalyptic number.

1161610256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1161610256 is a deficient number, since it is larger than the sum of its proper divisors (1141350976).

1161610256 is a wasteful number, since it uses less digits than its factorization.

1161610256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688438 (or 1688432 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1161610256 is about 34082.4039058280. The cubic root of 1161610256 is about 1051.2035348432.

Adding to 1161610256 its reverse (6520161611), we get a palindrome (7681771867).

The spelling of 1161610256 in words is "one billion, one hundred sixty-one million, six hundred ten thousand, two hundred fifty-six".