44861643881 has 2 divisors, whose sum is σ = 44861643882. Its totient is φ = 44861643880.

The previous prime is 44861643863. The next prime is 44861643887. The reversal of 44861643881 is 18834616844.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30937643881 + 13924000000 = 175891^2 + 118000^2 .

It is a cyclic number.

It is not a de Polignac number, because 44861643881 - 2¹⁴ = 44861627497 is a prime.

It is a super-2 number, since 2×44861643881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (44861643887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22430821940 + 22430821941.

It is an arithmetic number, because the mean of its divisors is an integer number (22430821941).

Almost surely, 2^44861643881 is an apocalyptic number.

It is an amenable number.

44861643881 is a deficient number, since it is larger than the sum of its proper divisors (1).

44861643881 is an equidigital number, since it uses as much as digits as its factorization.

44861643881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3538944, while the sum is 53.

The spelling of 44861643881 in words is "forty-four billion, eight hundred sixty-one million, six hundred forty-three thousand, eight hundred eighty-one".