1361253667655 has 32 divisors (see below), whose sum is σ = 1905613584000. Its totient is φ = 933111518976.

The previous prime is 1361253667643. The next prime is 1361253667687. The reversal of 1361253667655 is 5567663521631.

It is not a de Polignac number, because 1361253667655 - 2⁴ = 1361253667639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1361253667655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4930001 + ... + 5198789.

It is an arithmetic number, because the mean of its divisors is an integer number (59550424500).

Almost surely, 2^{1361253667655} is an apocalyptic number.

1361253667655 is a deficient number, since it is larger than the sum of its proper divisors (544359916345).

1361253667655 is an equidigital number, since it uses as much as digits as its factorization.

1361253667655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271768 (or 271754 counting only the distinct ones).

The product of its digits is 20412000, while the sum is 56.

The spelling of 1361253667655 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-seven thousand, six hundred fifty-five".