87776162009 has 2 divisors, whose sum is σ = 87776162010. Its totient is φ = 87776162008.

The previous prime is 87776161969. The next prime is 87776162027. The reversal of 87776162009 is 90026167778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87234576025 + 541585984 = 295355^2 + 23272^2 .

It is a cyclic number.

It is not a de Polignac number, because 87776162009 - 2¹² = 87776157913 is a prime.

It is not a weakly prime, because it can be changed into another prime (87776162909) 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, 43888081004 + 43888081005.

It is an arithmetic number, because the mean of its divisors is an integer number (43888081005).

Almost surely, 2^87776162009 is an apocalyptic number.

It is an amenable number.

87776162009 is a deficient number, since it is larger than the sum of its proper divisors (1).

87776162009 is an equidigital number, since it uses as much as digits as its factorization.

87776162009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The spelling of 87776162009 in words is "eighty-seven billion, seven hundred seventy-six million, one hundred sixty-two thousand, nine".