99999616015687 has 2 divisors, whose sum is σ = 99999616015688. Its totient is φ = 99999616015686.

The previous prime is 99999616015669. The next prime is 99999616015709. The reversal of 99999616015687 is 78651061699999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99999616015687 - 2²³ = 99999607627079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999616015087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999808007843 + 49999808007844.

It is an arithmetic number, because the mean of its divisors is an integer number (49999808007844).

Almost surely, 2^{99999616015687} is an apocalyptic number.

99999616015687 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999616015687 is an equidigital number, since it uses as much as digits as its factorization.

99999616015687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3571283520, while the sum is 85.

The spelling of 99999616015687 in words is "ninety-nine trillion, nine hundred ninety-nine billion, six hundred sixteen million, fifteen thousand, six hundred eighty-seven".