42888409549 has 2 divisors, whose sum is σ = 42888409550. Its totient is φ = 42888409548.

The previous prime is 42888409519. The next prime is 42888409579. The reversal of 42888409549 is 94590488824.

It is a balanced prime because it is at equal distance from previous prime (42888409519) and next prime (42888409579).

It can be written as a sum of positive squares in only one way, i.e., 32791777225 + 10096632324 = 181085^2 + 100482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42888409549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42888409519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21444204774 + 21444204775.

It is an arithmetic number, because the mean of its divisors is an integer number (21444204775).

Almost surely, 2^42888409549 is an apocalyptic number.

It is an amenable number.

42888409549 is a deficient number, since it is larger than the sum of its proper divisors (1).

42888409549 is an equidigital number, since it uses as much as digits as its factorization.

42888409549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26542080, while the sum is 61.

The spelling of 42888409549 in words is "forty-two billion, eight hundred eighty-eight million, four hundred nine thousand, five hundred forty-nine".