99999616015087 has 2 divisors, whose sum is σ = 99999616015088. Its totient is φ = 99999616015086.

The previous prime is 99999616015073. The next prime is 99999616015129. The reversal of 99999616015087 is 78051061699999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999616015087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99999616014998 and 99999616015016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999616015687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999808007543 + 49999808007544.

It is an arithmetic number, because the mean of its divisors is an integer number (49999808007544).

Almost surely, 2^{99999616015087} is an apocalyptic number.

99999616015087 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999616015087 is an equidigital number, since it uses as much as digits as its factorization.

99999616015087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 595213920, while the sum is 79.

The spelling of 99999616015087 in words is "ninety-nine trillion, nine hundred ninety-nine billion, six hundred sixteen million, fifteen thousand, eighty-seven".