8117554840 has 64 divisors (see below), whose sum is σ = 18373521600. Its totient is φ = 3227707392.

The previous prime is 8117554831. The next prime is 8117554843. The reversal of 8117554840 is 484557118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8117554843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6296916 + ... + 6298204.

It is an arithmetic number, because the mean of its divisors is an integer number (287086275).

Almost surely, 2^8117554840 is an apocalyptic number.

It is an amenable number.

8117554840 is an abundant number, since it is smaller than the sum of its proper divisors (10255966760).

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

8117554840 is a wasteful number, since it uses less digits than its factorization.

8117554840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 8117554840 is about 90097.4741044387. The cubic root of 8117554840 is about 2009.7486414556.

The spelling of 8117554840 in words is "eight billion, one hundred seventeen million, five hundred fifty-four thousand, eight hundred forty".