1131609456 has 60 divisors (see below), whose sum is σ = 3169327408. Its totient is φ = 376918272.

The previous prime is 1131609433. The next prime is 1131609473. The reversal of 1131609456 is 6549061311.

1131609456 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 609 + 45 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1131609456.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285021 + ... + 288963.

Almost surely, 2^1131609456 is an apocalyptic number.

1131609456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1131609456 is an abundant number, since it is smaller than the sum of its proper divisors (2037717952).

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

1131609456 is a wasteful number, since it uses less digits than its factorization.

1131609456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950 (or 5941 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1131609456 is about 33639.4033240781. The cubic root of 1131609456 is about 1042.0747094678.

The spelling of 1131609456 in words is "one billion, one hundred thirty-one million, six hundred nine thousand, four hundred fifty-six".