8081406672 has 40 divisors (see below), whose sum is σ = 20894079360. Its totient is φ = 2691594240.

The previous prime is 8081406653. The next prime is 8081406691. The reversal of 8081406672 is 2766041808.

It is an interprime number because it is at equal distance from previous prime (8081406653) and next prime (8081406691).

It is a super-2 number, since 2×8081406672² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9297 + ... + 127472.

It is an arithmetic number, because the mean of its divisors is an integer number (522351984).

Almost surely, 2^8081406672 is an apocalyptic number.

It is an amenable number.

8081406672 is an abundant number, since it is smaller than the sum of its proper divisors (12812672688).

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

8081406672 is a wasteful number, since it uses less digits than its factorization.

8081406672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138011 (or 138005 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 8081406672 is about 89896.6443867623. The cubic root of 8081406672 is about 2006.7610079645.

The spelling of 8081406672 in words is "eight billion, eighty-one million, four hundred six thousand, six hundred seventy-two".