78899804692 has 6 divisors (see below), whose sum is σ = 138074658218. Its totient is φ = 39449902344.

The previous prime is 78899804689. The next prime is 78899804747. The reversal of 78899804692 is 29640899887.

It can be written as a sum of positive squares in only one way, i.e., 50663707396 + 28236097296 = 225086^2 + 168036^2 .

It is a congruent number.

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, 9862475583 + ... + 9862475590.

Almost surely, 2^78899804692 is an apocalyptic number.

It is an amenable number.

78899804692 is a deficient number, since it is larger than the sum of its proper divisors (59174853526).

78899804692 is a wasteful number, since it uses less digits than its factorization.

78899804692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19724951177 (or 19724951175 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 70.

The spelling of 78899804692 in words is "seventy-eight billion, eight hundred ninety-nine million, eight hundred four thousand, six hundred ninety-two".