1264327553 has 4 divisors (see below), whose sum is σ = 1338699780. Its totient is φ = 1189955328.

The previous prime is 1264327543. The next prime is 1264327567. The reversal of 1264327553 is 3557234621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3557234621 = 47 ⋅75685843.

It can be written as a sum of positive squares in 2 ways, for example, as 1111755649 + 152571904 = 33343^2 + 12352^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264327553 - 2⁶ = 1264327489 is a prime.

It is a super-2 number, since 2×1264327553² = 3197048322549935618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264327513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37186088 + ... + 37186121.

It is an arithmetic number, because the mean of its divisors is an integer number (334674945).

Almost surely, 2^1264327553 is an apocalyptic number.

It is an amenable number.

1264327553 is a deficient number, since it is larger than the sum of its proper divisors (74372227).

1264327553 is an equidigital number, since it uses as much as digits as its factorization.

1264327553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74372226.

The product of its digits is 151200, while the sum is 38.

The square root of 1264327553 is about 35557.3839448292. The cubic root of 1264327553 is about 1081.3174232272.

The spelling of 1264327553 in words is "one billion, two hundred sixty-four million, three hundred twenty-seven thousand, five hundred fifty-three".