1264553604 has 36 divisors (see below), whose sum is σ = 3214187340. Its totient is φ = 419186880.

The previous prime is 1264553603. The next prime is 1264553617. The reversal of 1264553604 is 4063554621.

1264553604 is a `hidden beast` number, since 1 + 2 + 6 + 45 + 5 + 3 + 604 = 666.

1264553604 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4161600 + 1260392004 = 2040^2 + 35502^2 .

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 (1264553603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90519 + ... + 103550.

Almost surely, 2^1264553604 is an apocalyptic number.

It is an amenable number.

1264553604 is an abundant number, since it is smaller than the sum of its proper divisors (1949633736).

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

1264553604 is a wasteful number, since it uses less digits than its factorization.

1264553604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194260 (or 194255 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1264553604 is about 35560.5624814906. The cubic root of 1264553604 is about 1081.3818628360.

The spelling of 1264553604 in words is "one billion, two hundred sixty-four million, five hundred fifty-three thousand, six hundred four".