44013644101561 has 16 divisors (see below), whose sum is σ = 44163936302400. Its totient is φ = 43863632326080.

The previous prime is 44013644101507. The next prime is 44013644101579. The reversal of 44013644101561 is 16510144631044.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44013644101561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44013044101561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4019872515 + ... + 4019883463.

It is an arithmetic number, because the mean of its divisors is an integer number (2760246018900).

Almost surely, 2^{44013644101561} is an apocalyptic number.

It is an amenable number.

44013644101561 is a deficient number, since it is larger than the sum of its proper divisors (150292200839).

44013644101561 is a wasteful number, since it uses less digits than its factorization.

44013644101561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22536.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 44013644101561 in words is "forty-four trillion, thirteen billion, six hundred forty-four million, one hundred one thousand, five hundred sixty-one".