99213989607651 has 4 divisors (see below), whose sum is σ = 132285319476872. Its totient is φ = 66142659738432.

The previous prime is 99213989607619. The next prime is 99213989607659. The reversal of 99213989607651 is 15670698931299.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99213989607651 - 2⁵ = 99213989607619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99213989607659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16535664934606 + ... + 16535664934611.

It is an arithmetic number, because the mean of its divisors is an integer number (33071329869218).

Almost surely, 2^{99213989607651} is an apocalyptic number.

99213989607651 is a deficient number, since it is larger than the sum of its proper divisors (33071329869221).

99213989607651 is a wasteful number, since it uses less digits than its factorization.

99213989607651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33071329869220.

The product of its (nonzero) digits is 396809280, while the sum is 75.

The spelling of 99213989607651 in words is "ninety-nine trillion, two hundred thirteen billion, nine hundred eighty-nine million, six hundred seven thousand, six hundred fifty-one".