1181660544 has 48 divisors (see below), whose sum is σ = 3400354620. Its totient is φ = 393886464.

The previous prime is 1181660539. The next prime is 1181660551. The reversal of 1181660544 is 4450661811.

1181660544 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 6 + 605 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1181660499 and 1181660508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511722 + ... + 514025.

Almost surely, 2^1181660544 is an apocalyptic number.

It is an amenable number.

1181660544 is an abundant number, since it is smaller than the sum of its proper divisors (2218694076).

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

1181660544 is a wasteful number, since it uses less digits than its factorization.

1181660544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025767 (or 1025752 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1181660544 is about 34375.2897296881. The cubic root of 1181660544 is about 1057.2172602264.

The spelling of 1181660544 in words is "one billion, one hundred eighty-one million, six hundred sixty thousand, five hundred forty-four".