1361253667651 has 4 divisors (see below), whose sum is σ = 1363959937872. Its totient is φ = 1358547397432.

The previous prime is 1361253667643. The next prime is 1361253667687. The reversal of 1361253667651 is 1567663521631.

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 1361253667651 - 2³ = 1361253667643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361253667621) 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 3 ways as a sum of consecutive naturals, for example, 1353134356 + ... + 1353135361.

It is an arithmetic number, because the mean of its divisors is an integer number (340989984468).

Almost surely, 2^{1361253667651} is an apocalyptic number.

1361253667651 is a deficient number, since it is larger than the sum of its proper divisors (2706270221).

1361253667651 is an equidigital number, since it uses as much as digits as its factorization.

1361253667651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706270220.

The product of its digits is 4082400, while the sum is 52.

The spelling of 1361253667651 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-seven thousand, six hundred fifty-one".