78794249788 has 6 divisors (see below), whose sum is σ = 137889937136. Its totient is φ = 39397124892.

The previous prime is 78794249777. The next prime is 78794249797. The reversal of 78794249788 is 88794249787.

It is a self number, because there is not a number n which added to its sum of digits gives 78794249788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9849281220 + ... + 9849281227.

Almost surely, 2^78794249788 is an apocalyptic number.

It is an amenable number.

78794249788 is a deficient number, since it is larger than the sum of its proper divisors (59095687348).

78794249788 is a wasteful number, since it uses less digits than its factorization.

78794249788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19698562451 (or 19698562449 counting only the distinct ones).

The product of its digits is 455196672, while the sum is 73.

Subtracting 78794249788 from its reverse (88794249787), we obtain a palindrome (9999999999).

The spelling of 78794249788 in words is "seventy-eight billion, seven hundred ninety-four million, two hundred forty-nine thousand, seven hundred eighty-eight".