44677778917 has 2 divisors, whose sum is σ = 44677778918. Its totient is φ = 44677778916.

The previous prime is 44677778909. The next prime is 44677778939. The reversal of 44677778917 is 71987777644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37742387076 + 6935391841 = 194274^2 + 83279^2 .

It is a cyclic number.

It is not a de Polignac number, because 44677778917 - 2³ = 44677778909 is a prime.

It is a super-2 number, since 2×44677778917² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44677772917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22338889458 + 22338889459.

It is an arithmetic number, because the mean of its divisors is an integer number (22338889459).

Almost surely, 2^44677778917 is an apocalyptic number.

It is an amenable number.

44677778917 is a deficient number, since it is larger than the sum of its proper divisors (1).

44677778917 is an equidigital number, since it uses as much as digits as its factorization.

44677778917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116169984, while the sum is 67.

The spelling of 44677778917 in words is "forty-four billion, six hundred seventy-seven million, seven hundred seventy-eight thousand, nine hundred seventeen".