1361172638791 has 16 divisors (see below), whose sum is σ = 1559131360000. Its totient is φ = 1164093016320.

The previous prime is 1361172638741. The next prime is 1361172638827. The reversal of 1361172638791 is 1978362711631.

It is a cyclic number.

It is not a de Polignac number, because 1361172638791 - 2⁷ = 1361172638663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361172638741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5928760 + ... + 6154066.

It is an arithmetic number, because the mean of its divisors is an integer number (97445710000).

Almost surely, 2^{1361172638791} is an apocalyptic number.

1361172638791 is a deficient number, since it is larger than the sum of its proper divisors (197958721209).

1361172638791 is a wasteful number, since it uses less digits than its factorization.

1361172638791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227254.

The product of its digits is 2286144, while the sum is 55.

The spelling of 1361172638791 in words is "one trillion, three hundred sixty-one billion, one hundred seventy-two million, six hundred thirty-eight thousand, seven hundred ninety-one".