99138155536 has 60 divisors (see below), whose sum is σ = 236583778428. Its totient is φ = 39988494336.

The previous prime is 99138155531. The next prime is 99138155551. The reversal of 99138155536 is 63555183199.

It can be written as a sum of positive squares in 2 ways, for example, as 26583345936 + 72554809600 = 163044^2 + 269360^2 .

It is not an unprimeable number, because it can be changed into a prime (99138155531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3705841 + ... + 3732496.

Almost surely, 2^99138155536 is an apocalyptic number.

It is an amenable number.

99138155536 is an abundant number, since it is smaller than the sum of its proper divisors (137445622892).

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

99138155536 is a wasteful number, since it uses less digits than its factorization.

99138155536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438376 (or 7438363 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 55.

The spelling of 99138155536 in words is "ninety-nine billion, one hundred thirty-eight million, one hundred fifty-five thousand, five hundred thirty-six".