1275243673653 has 24 divisors (see below), whose sum is σ = 1945818536480. Its totient is φ = 802571029920.

The previous prime is 1275243673601. The next prime is 1275243673661. The reversal of 1275243673653 is 3563763425721.

1275243673653 is a `hidden beast` number, since 1 + 2 + 7 + 524 + 3 + 67 + 3 + 6 + 53 = 666.

It is not a de Polignac number, because 1275243673653 - 2⁶ = 1275243673589 is a prime.

It is a super-4 number, since 4×1275243673653⁴ (a number of 50 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1275243673653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275243673453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13127518 + ... + 13224303.

Almost surely, 2^{1275243673653} is an apocalyptic number.

It is an amenable number.

1275243673653 is a deficient number, since it is larger than the sum of its proper divisors (670574862827).

1275243673653 is a wasteful number, since it uses less digits than its factorization.

1275243673653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26352129 (or 26352126 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 54.

The spelling of 1275243673653 in words is "one trillion, two hundred seventy-five billion, two hundred forty-three million, six hundred seventy-three thousand, six hundred fifty-three".