87778080838 has 32 divisors (see below), whose sum is σ = 153202129920. Its totient is φ = 36939281280.

The previous prime is 87778080833. The next prime is 87778080839. The reversal of 87778080838 is 83808087778.

It is a self number, because there is not a number n which added to its sum of digits gives 87778080838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87778080833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667395 + ... + 788017.

It is an arithmetic number, because the mean of its divisors is an integer number (4787566560).

Almost surely, 2^87778080838 is an apocalyptic number.

87778080838 is a deficient number, since it is larger than the sum of its proper divisors (65424049082).

87778080838 is a wasteful number, since it uses less digits than its factorization.

87778080838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121572.

The product of its (nonzero) digits is 33718272, while the sum is 64.

The spelling of 87778080838 in words is "eighty-seven billion, seven hundred seventy-eight million, eighty thousand, eight hundred thirty-eight".