8278771381 has 8 divisors (see below), whose sum is σ = 8614884960. Its totient is φ = 7949184432.

The previous prime is 8278771357. The next prime is 8278771393. The reversal of 8278771381 is 1831778728.

8278771381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8278771381 - 2⁹ = 8278770869 is a prime.

It is a super-2 number, since 2×8278771381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8278771351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629070 + ... + 1634143.

It is an arithmetic number, because the mean of its divisors is an integer number (1076860620).

Almost surely, 2^8278771381 is an apocalyptic number.

It is an amenable number.

8278771381 is a deficient number, since it is larger than the sum of its proper divisors (336113579).

8278771381 is a wasteful number, since it uses less digits than its factorization.

8278771381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263315.

The product of its digits is 1053696, while the sum is 52.

The square root of 8278771381 is about 90987.7540166807. The cubic root of 8278771381 is about 2022.9662154357.

The spelling of 8278771381 in words is "eight billion, two hundred seventy-eight million, seven hundred seventy-one thousand, three hundred eighty-one".