1161432664 has 64 divisors (see below), whose sum is σ = 2563522560. Its totient is φ = 482889600.

The previous prime is 1161432661. The next prime is 1161432683. The reversal of 1161432664 is 4662341611.

It is a super-2 number, since 2×1161432664² = 2697851666012273792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161432661) 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 15 ways as a sum of consecutive naturals, for example, 1008489 + ... + 1009639.

It is an arithmetic number, because the mean of its divisors is an integer number (40055040).

Almost surely, 2^1161432664 is an apocalyptic number.

1161432664 is a gapful number since it is divisible by the number (14) 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 1161432664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281761280).

1161432664 is an abundant number, since it is smaller than the sum of its proper divisors (1402089896).

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

1161432664 is a wasteful number, since it uses less digits than its factorization.

1161432664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688 (or 1684 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 1161432664 is about 34079.7984735826. The cubic root of 1161432664 is about 1051.1499612653.

The spelling of 1161432664 in words is "one billion, one hundred sixty-one million, four hundred thirty-two thousand, six hundred sixty-four".