99449978535 has 24 divisors (see below), whose sum is σ = 172513794960. Its totient is φ = 52998809472.

The previous prime is 99449978531. The next prime is 99449978549. The reversal of 99449978535 is 53587994499.

99449978535 is a `hidden beast` number, since 99 + 449 + 97 + 8 + 5 + 3 + 5 = 666.

It is not a de Polignac number, because 99449978535 - 2² = 99449978531 is a prime.

It is a super-2 number, since 2×99449978535² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99449978531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 799249 + ... + 915258.

It is an arithmetic number, because the mean of its divisors is an integer number (7188074790).

Almost surely, 2^99449978535 is an apocalyptic number.

99449978535 is a deficient number, since it is larger than the sum of its proper divisors (73063816425).

99449978535 is a wasteful number, since it uses less digits than its factorization.

99449978535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715807 (or 1715804 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 72.

The spelling of 99449978535 in words is "ninety-nine billion, four hundred forty-nine million, nine hundred seventy-eight thousand, five hundred thirty-five".