1561336238587 has 2 divisors, whose sum is σ = 1561336238588. Its totient is φ = 1561336238586.

The previous prime is 1561336238573. The next prime is 1561336238617. The reversal of 1561336238587 is 7858326331651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561336238587 - 2¹¹ = 1561336236539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1561336238507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780668119293 + 780668119294.

It is an arithmetic number, because the mean of its divisors is an integer number (780668119294).

Almost surely, 2^{1561336238587} is an apocalyptic number.

1561336238587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561336238587 is an equidigital number, since it uses as much as digits as its factorization.

1561336238587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 58.

The spelling of 1561336238587 in words is "one trillion, five hundred sixty-one billion, three hundred thirty-six million, two hundred thirty-eight thousand, five hundred eighty-seven".