8131440016 has 40 divisors (see below), whose sum is σ = 18009690560. Its totient is φ = 3484059264.

The previous prime is 8131439977. The next prime is 8131440019. The reversal of 8131440016 is 6100441318.

It is a super-2 number, since 2×8131440016² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (8131440019) 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, 737875 + ... + 748813.

It is an arithmetic number, because the mean of its divisors is an integer number (450242264).

Almost surely, 2^8131440016 is an apocalyptic number.

It is an amenable number.

8131440016 is an abundant number, since it is smaller than the sum of its proper divisors (9878250544).

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

8131440016 is a wasteful number, since it uses less digits than its factorization.

8131440016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17591 (or 17585 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8131440016 is about 90174.4975921685. The cubic root of 8131440016 is about 2010.8938885254.

The spelling of 8131440016 in words is "eight billion, one hundred thirty-one million, four hundred forty thousand, sixteen".