1161012618 has 12 divisors (see below), whose sum is σ = 2515527378. Its totient is φ = 387004200.

The previous prime is 1161012617. The next prime is 1161012673. The reversal of 1161012618 is 8162101611.

1161012618 is a `hidden beast` number, since 11 + 610 + 1 + 26 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1159198209 + 1814409 = 34047^2 + 1347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1161012591 and 1161012600.

It is not an unprimeable number, because it can be changed into a prime (1161012617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32250333 + ... + 32250368.

Almost surely, 2^1161012618 is an apocalyptic number.

1161012618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1161012618 is an abundant number, since it is smaller than the sum of its proper divisors (1354514760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161012618 is a wasteful number, since it uses less digits than its factorization.

1161012618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64500709 (or 64500706 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1161012618 is about 34073.6352331242. The cubic root of 1161012618 is about 1051.0232256713.

The spelling of 1161012618 in words is "one billion, one hundred sixty-one million, twelve thousand, six hundred eighteen".