1273168181551 has 4 divisors (see below), whose sum is σ = 1455049350352. Its totient is φ = 1091287012752.

The previous prime is 1273168181503. The next prime is 1273168181569. The reversal of 1273168181551 is 1551818613721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1273168181551 - 2¹³ = 1273168173359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1273168181495 and 1273168181504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273168182551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90940584390 + ... + 90940584403.

It is an arithmetic number, because the mean of its divisors is an integer number (363762337588).

Almost surely, 2^{1273168181551} is an apocalyptic number.

1273168181551 is a deficient number, since it is larger than the sum of its proper divisors (181881168801).

1273168181551 is an equidigital number, since it uses as much as digits as its factorization.

1273168181551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181881168800.

The product of its digits is 403200, while the sum is 49.

The spelling of 1273168181551 in words is "one trillion, two hundred seventy-three billion, one hundred sixty-eight million, one hundred eighty-one thousand, five hundred fifty-one".