44138167640 has 32 divisors (see below), whose sum is σ = 113498146080. Its totient is φ = 15133085952.

The previous prime is 44138167621. The next prime is 44138167663. The reversal of 44138167640 is 4676183144.

It is a junction number, because it is equal to n+sod(n) for n = 44138167591 and 44138167600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78817877 + ... + 78818436.

It is an arithmetic number, because the mean of its divisors is an integer number (3546817065).

Almost surely, 2^44138167640 is an apocalyptic number.

44138167640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44138167640 is an abundant number, since it is smaller than the sum of its proper divisors (69359978440).

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

44138167640 is a wasteful number, since it uses less digits than its factorization.

44138167640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157636331 (or 157636327 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 44138167640 in words is "forty-four billion, one hundred thirty-eight million, one hundred sixty-seven thousand, six hundred forty".