44973517661 has 8 divisors (see below), whose sum is σ = 46129613400. Its totient is φ = 43828812352.

The previous prime is 44973517657. The next prime is 44973517679. The reversal of 44973517661 is 16671537944.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10879741636 + 34093776025 = 104306^2 + 184645^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 44973517661 - 2² = 44973517657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44973517601) 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 7 ways as a sum of consecutive naturals, for example, 2839610 + ... + 2855403.

It is an arithmetic number, because the mean of its divisors is an integer number (5766201675).

Almost surely, 2^44973517661 is an apocalyptic number.

It is an amenable number.

44973517661 is a deficient number, since it is larger than the sum of its proper divisors (1156095739).

44973517661 is a wasteful number, since it uses less digits than its factorization.

44973517661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695215.

The product of its digits is 3810240, while the sum is 53.

The spelling of 44973517661 in words is "forty-four billion, nine hundred seventy-three million, five hundred seventeen thousand, six hundred sixty-one".