99978685082 has 4 divisors (see below), whose sum is σ = 149968027626. Its totient is φ = 49989342540.

The previous prime is 99978685069. The next prime is 99978685109. The reversal of 99978685082 is 28058687999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28058687999 = 223 ⋅125823713.

It can be written as a sum of positive squares in only one way, i.e., 59171049001 + 40807636081 = 243251^2 + 202009^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99978684997 and 99978685015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24994671269 + ... + 24994671272.

Almost surely, 2^99978685082 is an apocalyptic number.

99978685082 is a deficient number, since it is larger than the sum of its proper divisors (49989342544).

99978685082 is a wasteful number, since it uses less digits than its factorization.

99978685082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49989342543.

The product of its (nonzero) digits is 156764160, while the sum is 71.

The spelling of 99978685082 in words is "ninety-nine billion, nine hundred seventy-eight million, six hundred eighty-five thousand, eighty-two".