8101778427 has 6 divisors (see below), whose sum is σ = 11702568852. Its totient is φ = 5401185612.

The previous prime is 8101778413. The next prime is 8101778431. The reversal of 8101778427 is 7248771018.

It is not a de Polignac number, because 8101778427 - 2⁴ = 8101778411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8101778527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450098793 + ... + 450098810.

It is an arithmetic number, because the mean of its divisors is an integer number (1950428142).

Almost surely, 2^8101778427 is an apocalyptic number.

8101778427 is a deficient number, since it is larger than the sum of its proper divisors (3600790425).

8101778427 is a wasteful number, since it uses less digits than its factorization.

8101778427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900197609 (or 900197606 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The square root of 8101778427 is about 90009.8796077408. The cubic root of 8101778427 is about 2008.4458194456.

The spelling of 8101778427 in words is "eight billion, one hundred one million, seven hundred seventy-eight thousand, four hundred twenty-seven".