99999999999949 has 16 divisors (see below), whose sum is σ = 116769455308800. Its totient is φ = 83853109012464.

The previous prime is 99999999999931. The next prime is 99999999999959. The reversal of 99999999999949 is 94999999999999.

It is a cyclic number.

It is not a de Polignac number, because 99999999999949 - 2⁷ = 99999999999821 is a prime.

It is a super-9 number, since 9×99999999999949⁹ (a number of 127 digits) contains 999999999 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99999999999949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999999999929) 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, 67139959 + ... + 68613220.

It is an arithmetic number, because the mean of its divisors is an integer number (7298090956800).

Almost surely, 2^{99999999999949} is an apocalyptic number.

It is an amenable number.

99999999999949 is a deficient number, since it is larger than the sum of its proper divisors (16769455308851).

99999999999949 is a wasteful number, since it uses less digits than its factorization.

99999999999949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135755472.

The product of its digits is 10167463313316, while the sum is 121.

The spelling of 99999999999949 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-nine".