99261455538 has 16 divisors (see below), whose sum is σ = 226883327040. Its totient is φ = 28360415856.

The previous prime is 99261455537. The next prime is 99261455569. The reversal of 99261455538 is 83555416299.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99261455537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181683953 + ... + 1181684036.

It is an arithmetic number, because the mean of its divisors is an integer number (14180207940).

Almost surely, 2^99261455538 is an apocalyptic number.

99261455538 is an abundant number, since it is smaller than the sum of its proper divisors (127621871502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99261455538 is a wasteful number, since it uses less digits than its factorization.

99261455538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363368001.

The product of its digits is 11664000, while the sum is 57.

The spelling of 99261455538 in words is "ninety-nine billion, two hundred sixty-one million, four hundred fifty-five thousand, five hundred thirty-eight".