87186516623 has 2 divisors, whose sum is σ = 87186516624. Its totient is φ = 87186516622.

The previous prime is 87186516451. The next prime is 87186516679. The reversal of 87186516623 is 32661568178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87186516623 - 2¹² = 87186512527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87186516223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43593258311 + 43593258312.

It is an arithmetic number, because the mean of its divisors is an integer number (43593258312).

Almost surely, 2^87186516623 is an apocalyptic number.

87186516623 is a deficient number, since it is larger than the sum of its proper divisors (1).

87186516623 is an equidigital number, since it uses as much as digits as its factorization.

87186516623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 87186516623 in words is "eighty-seven billion, one hundred eighty-six million, five hundred sixteen thousand, six hundred twenty-three".