44626561686 has 128 divisors (see below), whose sum is σ = 118440222720. Its totient is φ = 12338879040.

The previous prime is 44626561631. The next prime is 44626561687. The reversal of 44626561686 is 68616562644.

44626561686 is a `hidden beast` number, since 4 + 4 + 626 + 5 + 6 + 1 + 6 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44626561687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 925650 + ... + 972666.

It is an arithmetic number, because the mean of its divisors is an integer number (925314240).

Almost surely, 2^44626561686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44626561686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59220111360).

44626561686 is an abundant number, since it is smaller than the sum of its proper divisors (73813661034).

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

44626561686 is an equidigital number, since it uses as much as digits as its factorization.

44626561686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47078 (or 47060 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 44626561686 in words is "forty-four billion, six hundred twenty-six million, five hundred sixty-one thousand, six hundred eighty-six".