44140135621 has 8 divisors (see below), whose sum is σ = 45114292224. Its totient is φ = 43175769840.

The previous prime is 44140135603. The next prime is 44140135631. The reversal of 44140135621 is 12653104144.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44140135621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44140135631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2438590 + ... + 2456623.

It is an arithmetic number, because the mean of its divisors is an integer number (5639286528).

Almost surely, 2^44140135621 is an apocalyptic number.

It is an amenable number.

44140135621 is a deficient number, since it is larger than the sum of its proper divisors (974156603).

44140135621 is a wasteful number, since it uses less digits than its factorization.

44140135621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895411.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 44140135621 its reverse (12653104144), we get a palindrome (56793239765).

The spelling of 44140135621 in words is "forty-four billion, one hundred forty million, one hundred thirty-five thousand, six hundred twenty-one".