1361253667665 has 8 divisors (see below), whose sum is σ = 2178005868288. Its totient is φ = 726001956080.

The previous prime is 1361253667643. The next prime is 1361253667687. The reversal of 1361253667665 is 5667663521631.

It is an interprime number because it is at equal distance from previous prime (1361253667643) and next prime (1361253667687).

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

It is not a de Polignac number, because 1361253667665 - 2⁹ = 1361253667153 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 45375122241 + ... + 45375122270.

It is an arithmetic number, because the mean of its divisors is an integer number (272250733536).

Almost surely, 2^{1361253667665} is an apocalyptic number.

1361253667665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361253667665 is a deficient number, since it is larger than the sum of its proper divisors (816752200623).

1361253667665 is an equidigital number, since it uses as much as digits as its factorization.

1361253667665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90750244519.

The product of its digits is 24494400, while the sum is 57.

The spelling of 1361253667665 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-seven thousand, six hundred sixty-five".