44971331640 has 128 divisors (see below), whose sum is σ = 138190752000. Its totient is φ = 11704025088.

The previous prime is 44971331597. The next prime is 44971331653. The reversal of 44971331640 is 4613317944.

It is a junction number, because it is equal to n+sod(n) for n = 44971331592 and 44971331601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961272 + ... + 1006968.

It is an arithmetic number, because the mean of its divisors is an integer number (1079615250).

Almost surely, 2^44971331640 is an apocalyptic number.

44971331640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44971331640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69095376000).

44971331640 is an abundant number, since it is smaller than the sum of its proper divisors (93219420360).

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

44971331640 is a wasteful number, since it uses less digits than its factorization.

44971331640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45909 (or 45905 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 44971331640 in words is "forty-four billion, nine hundred seventy-one million, three hundred thirty-one thousand, six hundred forty".