1361561384858 has 16 divisors (see below), whose sum is σ = 2055203449344. Its totient is φ = 676501098240.

The previous prime is 1361561384851. The next prime is 1361561384893. The reversal of 1361561384858 is 8584831651631.

It is a junction number, because it is equal to n+sod(n) for n = 1361561384797 and 1361561384806.

It is not an unprimeable number, because it can be changed into a prime (1361561384851) 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, 1520135 + ... + 2243642.

It is an arithmetic number, because the mean of its divisors is an integer number (128450215584).

Almost surely, 2^{1361561384858} is an apocalyptic number.

1361561384858 is a deficient number, since it is larger than the sum of its proper divisors (693642064486).

1361561384858 is a wasteful number, since it uses less digits than its factorization.

1361561384858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3764917.

The product of its digits is 16588800, while the sum is 59.

The spelling of 1361561384858 in words is "one trillion, three hundred sixty-one billion, five hundred sixty-one million, three hundred eighty-four thousand, eight hundred fifty-eight".