99216867639 has 16 divisors (see below), whose sum is σ = 133434031104. Its totient is φ = 65573164800.

The previous prime is 99216867611. The next prime is 99216867649. The reversal of 99216867639 is 93676861299.

It is a happy number.

It is not a de Polignac number, because 99216867639 - 2⁷ = 99216867511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99216867639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99216867649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262087 + ... + 516839.

It is an arithmetic number, because the mean of its divisors is an integer number (8339626944).

Almost surely, 2^99216867639 is an apocalyptic number.

99216867639 is a deficient number, since it is larger than the sum of its proper divisors (34217163465).

99216867639 is a wasteful number, since it uses less digits than its factorization.

99216867639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255878.

The product of its digits is 52907904, while the sum is 66.

The spelling of 99216867639 in words is "ninety-nine billion, two hundred sixteen million, eight hundred sixty-seven thousand, six hundred thirty-nine".