78881761205 has 8 divisors (see below), whose sum is σ = 101939506872. Its totient is φ = 58251146688.

The previous prime is 78881761187. The next prime is 78881761289. The reversal of 78881761205 is 50216718887.

It can be written as a sum of positive squares in 4 ways, for example, as 3813433009 + 75068328196 = 61753^2 + 273986^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78881761205 - 2¹² = 78881757109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606782714 + ... + 606782843.

It is an arithmetic number, because the mean of its divisors is an integer number (12742438359).

Almost surely, 2^78881761205 is an apocalyptic number.

It is an amenable number.

78881761205 is a deficient number, since it is larger than the sum of its proper divisors (23057745667).

78881761205 is a wasteful number, since it uses less digits than its factorization.

78881761205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213565575.

The product of its (nonzero) digits is 1505280, while the sum is 53.

The spelling of 78881761205 in words is "seventy-eight billion, eight hundred eighty-one million, seven hundred sixty-one thousand, two hundred five".