8131726740 has 24 divisors (see below), whose sum is σ = 22768835040. Its totient is φ = 2168460448.

The previous prime is 8131726717. The next prime is 8131726747. The reversal of 8131726740 is 476271318.

It is a super-2 number, since 2×8131726740² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131726747) 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, 67764330 + ... + 67764449.

It is an arithmetic number, because the mean of its divisors is an integer number (948701460).

Almost surely, 2^8131726740 is an apocalyptic number.

It is an amenable number.

8131726740 is an abundant number, since it is smaller than the sum of its proper divisors (14637108300).

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

8131726740 is a wasteful number, since it uses less digits than its factorization.

8131726740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135528791 (or 135528789 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 8131726740 is about 90176.0874068065. The cubic root of 8131726740 is about 2010.9175237307.

The spelling of 8131726740 in words is "eight billion, one hundred thirty-one million, seven hundred twenty-six thousand, seven hundred forty".