7849271538 has 24 divisors (see below), whose sum is σ = 17466398508. Its totient is φ = 2545709472.

The previous prime is 7849271537. The next prime is 7849271543. The reversal of 7849271538 is 8351729487.

It is a happy number.

7849271538 is a `hidden beast` number, since 7 + 84 + 9 + 27 + 1 + 538 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7646977809 + 202293729 = 87447^2 + 14223^2 .

It is a super-2 number, since 2×7849271538² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7849271537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5892181 + ... + 5893512.

Almost surely, 2^7849271538 is an apocalyptic number.

7849271538 is an abundant number, since it is smaller than the sum of its proper divisors (9617126970).

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

7849271538 is a wasteful number, since it uses less digits than its factorization.

7849271538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11785738 (or 11785735 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 7849271538 is about 88596.1146890765. The cubic root of 7849271538 is about 1987.3595729429.

The spelling of 7849271538 in words is "seven billion, eight hundred forty-nine million, two hundred seventy-one thousand, five hundred thirty-eight".