99852478449 has 4 divisors (see below), whose sum is σ = 133136637936. Its totient is φ = 66568318964.

The previous prime is 99852478339. The next prime is 99852478469. The reversal of 99852478449 is 94487425899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94487425899 = 3 ⋅31495808633.

It is a cyclic number.

It is not a de Polignac number, because 99852478449 - 2²⁵ = 99818924017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99852478469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16642079739 + ... + 16642079744.

It is an arithmetic number, because the mean of its divisors is an integer number (33284159484).

Almost surely, 2^99852478449 is an apocalyptic number.

It is an amenable number.

99852478449 is a deficient number, since it is larger than the sum of its proper divisors (33284159487).

99852478449 is a wasteful number, since it uses less digits than its factorization.

99852478449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33284159486.

The product of its digits is 209018880, while the sum is 69.

The spelling of 99852478449 in words is "ninety-nine billion, eight hundred fifty-two million, four hundred seventy-eight thousand, four hundred forty-nine".