1161639468 has 120 divisors (see below), whose sum is σ = 3325213584. Its totient is φ = 350697600.

The previous prime is 1161639433. The next prime is 1161639469. The reversal of 1161639468 is 8649361611.

1161639468 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 639 + 4 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1161639469) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1414498 + ... + 1415318.

Almost surely, 2^1161639468 is an apocalyptic number.

1161639468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161639468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662606792).

1161639468 is an abundant number, since it is smaller than the sum of its proper divisors (2163574116).

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

1161639468 is a wasteful number, since it uses less digits than its factorization.

1161639468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1234 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1161639468 is about 34082.8324527173. The cubic root of 1161639468 is about 1051.2123466055.

The spelling of 1161639468 in words is "one billion, one hundred sixty-one million, six hundred thirty-nine thousand, four hundred sixty-eight".