99978898722902 has 8 divisors (see below), whose sum is σ = 150120909987696. Its totient is φ = 49938595393672.

The previous prime is 99978898722887. The next prime is 99978898722917. The reversal of 99978898722902 is 20922789887999.

It is an interprime number because it is at equal distance from previous prime (99978898722887) and next prime (99978898722917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 99978898722799 and 99978898722808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25426981433 + ... + 25426985364.

It is an arithmetic number, because the mean of its divisors is an integer number (18765113748462).

Almost surely, 2^{99978898722902} is an apocalyptic number.

99978898722902 is a deficient number, since it is larger than the sum of its proper divisors (50142011264794).

99978898722902 is a wasteful number, since it uses less digits than its factorization.

99978898722902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50853967782.

The product of its (nonzero) digits is 11851370496, while the sum is 89.

The spelling of 99978898722902 in words is "ninety-nine trillion, nine hundred seventy-eight billion, eight hundred ninety-eight million, seven hundred twenty-two thousand, nine hundred two".