99812567902 has 4 divisors (see below), whose sum is σ = 149718851856. Its totient is φ = 49906283950.

The previous prime is 99812567867. The next prime is 99812567929. The reversal of 99812567902 is 20976521899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20976521899 = 1231 ⋅17040229.

It is a super-2 number, since 2×99812567902² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 24953141974 + ... + 24953141977.

It is an arithmetic number, because the mean of its divisors is an integer number (37429712964).

Almost surely, 2^99812567902 is an apocalyptic number.

99812567902 is a deficient number, since it is larger than the sum of its proper divisors (49906283954).

99812567902 is a wasteful number, since it uses less digits than its factorization.

99812567902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49906283953.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 99812567902 in words is "ninety-nine billion, eight hundred twelve million, five hundred sixty-seven thousand, nine hundred two".