1361686727521 has 8 divisors (see below), whose sum is σ = 1379646321984. Its totient is φ = 1343764126800.

The previous prime is 1361686727501. The next prime is 1361686727587. The reversal of 1361686727521 is 1257276861631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361686727521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361686727501) 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, 9174330 + ... + 9321571.

It is an arithmetic number, because the mean of its divisors is an integer number (172455790248).

Almost surely, 2^{1361686727521} is an apocalyptic number.

It is an amenable number.

1361686727521 is a deficient number, since it is larger than the sum of its proper divisors (17959594463).

1361686727521 is an equidigital number, since it uses as much as digits as its factorization.

1361686727521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18496871.

The product of its digits is 5080320, while the sum is 55.

The spelling of 1361686727521 in words is "one trillion, three hundred sixty-one billion, six hundred eighty-six million, seven hundred twenty-seven thousand, five hundred twenty-one".