8540617820 has 48 divisors (see below), whose sum is σ = 20503277760. Its totient is φ = 2927384064.

The previous prime is 8540617751. The next prime is 8540617823. The reversal of 8540617820 is 287160458.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8540617823) 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, 689522 + ... + 701798.

It is an arithmetic number, because the mean of its divisors is an integer number (427151620).

Almost surely, 2^8540617820 is an apocalyptic number.

It is an amenable number.

8540617820 is an abundant number, since it is smaller than the sum of its proper divisors (11962659940).

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

8540617820 is a wasteful number, since it uses less digits than its factorization.

8540617820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17262 (or 17260 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 8540617820 is about 92415.4631000678. The cubic root of 8540617820 is about 2044.0731304648.

The spelling of 8540617820 in words is "eight billion, five hundred forty million, six hundred seventeen thousand, eight hundred twenty".