99544142536 has 8 divisors (see below), whose sum is σ = 186645267270. Its totient is φ = 49772071264.

The previous prime is 99544142527. The next prime is 99544142539. The reversal of 99544142536 is 63524144599.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 90725054436 + 8819088100 = 301206^2 + 93910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×99544142536² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99544142539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221508901 + ... + 6221508916.

Almost surely, 2^99544142536 is an apocalyptic number.

It is an amenable number.

99544142536 is a deficient number, since it is larger than the sum of its proper divisors (87101124734).

99544142536 is a wasteful number, since it uses less digits than its factorization.

99544142536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12443017823 (or 12443017819 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 52.

The spelling of 99544142536 in words is "ninety-nine billion, five hundred forty-four million, one hundred forty-two thousand, five hundred thirty-six".