1161403566 has 8 divisors (see below), whose sum is σ = 2322807144. Its totient is φ = 387134520.

The previous prime is 1161403559. The next prime is 1161403591. The reversal of 1161403566 is 6653041611.

It is a sphenic number, since it is the product of 3 distinct primes.

1161403566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96783625 + ... + 96783636.

It is an arithmetic number, because the mean of its divisors is an integer number (290350893).

Almost surely, 2^1161403566 is an apocalyptic number.

1161403566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1161403566 is a wasteful number, since it uses less digits than its factorization.

1161403566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193567266.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1161403566 is about 34079.3715611072. The cubic root of 1161403566 is about 1051.1411828493.

The spelling of 1161403566 in words is "one billion, one hundred sixty-one million, four hundred three thousand, five hundred sixty-six".