8621506044 has 72 divisors (see below), whose sum is σ = 23035892880. Its totient is φ = 2711232000.

The previous prime is 8621506043. The next prime is 8621506067. The reversal of 8621506044 is 4406051268.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621506043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138694 + ... + 190994.

Almost surely, 2^8621506044 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 8621506044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11517946440).

8621506044 is an abundant number, since it is smaller than the sum of its proper divisors (14414386836).

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

8621506044 is a wasteful number, since it uses less digits than its factorization.

8621506044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52571 (or 52566 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 8621506044 is about 92852.0653728284. The cubic root of 8621506044 is about 2050.5060058864.

The spelling of 8621506044 in words is "eight billion, six hundred twenty-one million, five hundred six thousand, forty-four".