1312261362155 has 8 divisors (see below), whose sum is σ = 1574719801200. Its totient is φ = 1049804978656.

The previous prime is 1312261362149. The next prime is 1312261362157. The reversal of 1312261362155 is 5512631622131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312261362155 - 2¹² = 1312261358059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312261362157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2090801 + ... + 2644989.

It is an arithmetic number, because the mean of its divisors is an integer number (196839975150).

Almost surely, 2^{1312261362155} is an apocalyptic number.

1312261362155 is a deficient number, since it is larger than the sum of its proper divisors (262458439045).

1312261362155 is an equidigital number, since it uses as much as digits as its factorization.

1312261362155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027773.

The product of its digits is 64800, while the sum is 38.

Adding to 1312261362155 its reverse (5512631622131), we get a palindrome (6824892984286).

The spelling of 1312261362155 in words is "one trillion, three hundred twelve billion, two hundred sixty-one million, three hundred sixty-two thousand, one hundred fifty-five".