79961869850 has 24 divisors (see below), whose sum is σ = 148822356828. Its totient is φ = 31964688000.

The previous prime is 79961869807. The next prime is 79961869877. The reversal of 79961869850 is 5896816997.

It can be written as a sum of positive squares in 6 ways, for example, as 2217373921 + 77744495929 = 47089^2 + 278827^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420851 + ... + 580550.

Almost surely, 2^79961869850 is an apocalyptic number.

79961869850 is a deficient number, since it is larger than the sum of its proper divisors (68860486978).

79961869850 is a wasteful number, since it uses less digits than its factorization.

79961869850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003010 (or 1003005 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 68.

The spelling of 79961869850 in words is "seventy-nine billion, nine hundred sixty-one million, eight hundred sixty-nine thousand, eight hundred fifty".