1361038605557 has 8 divisors (see below), whose sum is σ = 1404961934592. Its totient is φ = 1317116455200.

The previous prime is 1361038605551. The next prime is 1361038605569. The reversal of 1361038605557 is 7555068301631.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1361038605557 - 2⁸ = 1361038605301 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 (1361038605551) 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, 2461313 + ... + 2963129.

It is an arithmetic number, because the mean of its divisors is an integer number (175620241824).

Almost surely, 2^{1361038605557} is an apocalyptic number.

It is an amenable number.

1361038605557 is a deficient number, since it is larger than the sum of its proper divisors (43923329035).

1361038605557 is an equidigital number, since it uses as much as digits as its factorization.

1361038605557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589339.

The product of its (nonzero) digits is 2268000, while the sum is 50.

The spelling of 1361038605557 in words is "one trillion, three hundred sixty-one billion, thirty-eight million, six hundred five thousand, five hundred fifty-seven".