1264495517253 has 12 divisors (see below), whose sum is σ = 1826720269920. Its totient is φ = 842892359976.

The previous prime is 1264495517191. The next prime is 1264495517279. The reversal of 1264495517253 is 3527155944621.

1264495517253 is a `hidden beast` number, since 1 + 2 + 64 + 4 + 9 + 551 + 7 + 25 + 3 = 666.

It is not a de Polignac number, because 1264495517253 - 2⁸ = 1264495516997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264495517253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264497517253) 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, 8644401 + ... + 8789462.

It is an arithmetic number, because the mean of its divisors is an integer number (152226689160).

Almost surely, 2^{1264495517253} is an apocalyptic number.

It is an amenable number.

1264495517253 is a deficient number, since it is larger than the sum of its proper divisors (562224752667).

1264495517253 is a wasteful number, since it uses less digits than its factorization.

1264495517253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17441928 (or 17441925 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The spelling of 1264495517253 in words is "one trillion, two hundred sixty-four billion, four hundred ninety-five million, five hundred seventeen thousand, two hundred fifty-three".