1264553193555 has 16 divisors (see below), whose sum is σ = 2248094566560. Its totient is φ = 674428369824.

The previous prime is 1264553193511. The next prime is 1264553193557. The reversal of 1264553193555 is 5553913554621.

1264553193555 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 55 + 31 + 9 + 3 + 555 = 666.

It is not a de Polignac number, because 1264553193555 - 2¹⁴ = 1264553177171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264553193557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4683530212 + ... + 4683530481.

It is an arithmetic number, because the mean of its divisors is an integer number (140505910410).

Almost surely, 2^{1264553193555} is an apocalyptic number.

1264553193555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1264553193555 is a deficient number, since it is larger than the sum of its proper divisors (983541373005).

1264553193555 is an equidigital number, since it uses as much as digits as its factorization.

1264553193555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367060707 (or 9367060701 counting only the distinct ones).

The product of its digits is 12150000, while the sum is 54.

The spelling of 1264553193555 in words is "one trillion, two hundred sixty-four billion, five hundred fifty-three million, one hundred ninety-three thousand, five hundred fifty-five".