8101778620 has 48 divisors (see below), whose sum is σ = 18343892448. Its totient is φ = 2987930880.

The previous prime is 8101778611. The next prime is 8101778639. The reversal of 8101778620 is 268771018.

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 in 15 ways as a sum of consecutive naturals, for example, 210255 + ... + 245785.

It is an arithmetic number, because the mean of its divisors is an integer number (382164426).

Almost surely, 2^8101778620 is an apocalyptic number.

It is an amenable number.

8101778620 is an abundant number, since it is smaller than the sum of its proper divisors (10242113828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8101778620 is a wasteful number, since it uses less digits than its factorization.

8101778620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36430 (or 36428 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 8101778620 is about 90009.8806798454. The cubic root of 8101778620 is about 2008.4458353940.

The spelling of 8101778620 in words is "eight billion, one hundred one million, seven hundred seventy-eight thousand, six hundred twenty".