1126780164 has 36 divisors (see below), whose sum is σ = 2859620400. Its totient is φ = 374094000.

The previous prime is 1126780147. The next prime is 1126780169. The reversal of 1126780164 is 4610876211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (1126780169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53314 + ... + 71385.

It is an arithmetic number, because the mean of its divisors is an integer number (79433900).

Almost surely, 2^1126780164 is an apocalyptic number.

It is an amenable number.

1126780164 is an abundant number, since it is smaller than the sum of its proper divisors (1732840236).

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

1126780164 is a wasteful number, since it uses less digits than its factorization.

1126780164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124960 (or 124955 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1126780164 is about 33567.5462910234. The cubic root of 1126780164 is about 1040.5901987767.

The spelling of 1126780164 in words is "one billion, one hundred twenty-six million, seven hundred eighty thousand, one hundred sixty-four".