887983667561 has 2 divisors, whose sum is σ = 887983667562. Its totient is φ = 887983667560.

The previous prime is 887983667521. The next prime is 887983667617. The reversal of 887983667561 is 165766389788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 886836558400 + 1147109161 = 941720^2 + 33869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-887983667561 is a prime.

It is not a weakly prime, because it can be changed into another prime (887983667521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443991833780 + 443991833781.

It is an arithmetic number, because the mean of its divisors is an integer number (443991833781).

Almost surely, 2^887983667561 is an apocalyptic number.

It is an amenable number.

887983667561 is a deficient number, since it is larger than the sum of its proper divisors (1).

887983667561 is an equidigital number, since it uses as much as digits as its factorization.

887983667561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 731566080, while the sum is 74.

The spelling of 887983667561 in words is "eight hundred eighty-seven billion, nine hundred eighty-three million, six hundred sixty-seven thousand, five hundred sixty-one".