8554401640 has 64 divisors (see below), whose sum is σ = 20107906560. Its totient is φ = 3271445760.

The previous prime is 8554401623. The next prime is 8554401659. The reversal of 8554401640 is 461044558.

It is a self number, because there is not a number n which added to its sum of digits gives 8554401640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61362 + ... + 144478.

It is an arithmetic number, because the mean of its divisors is an integer number (314186040).

Almost surely, 2^8554401640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8554401640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10053953280).

8554401640 is an abundant number, since it is smaller than the sum of its proper divisors (11553504920).

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

8554401640 is a wasteful number, since it uses less digits than its factorization.

8554401640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83242 (or 83238 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 8554401640 is about 92490.0083252240. The cubic root of 8554401640 is about 2045.1721919478.

The spelling of 8554401640 in words is "eight billion, five hundred fifty-four million, four hundred one thousand, six hundred forty".