42556000849 has 2 divisors, whose sum is σ = 42556000850. Its totient is φ = 42556000848.

The previous prime is 42556000831. The next prime is 42556000957. The reversal of 42556000849 is 94800065524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27777222225 + 14778778624 = 166665^2 + 121568^2 .

It is a cyclic number.

It is not a de Polignac number, because 42556000849 - 2¹³ = 42555992657 is a prime.

It is a super-2 number, since 2×42556000849² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42556000049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278000424 + 21278000425.

It is an arithmetic number, because the mean of its divisors is an integer number (21278000425).

Almost surely, 2^42556000849 is an apocalyptic number.

It is an amenable number.

42556000849 is a deficient number, since it is larger than the sum of its proper divisors (1).

42556000849 is an equidigital number, since it uses as much as digits as its factorization.

42556000849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 42556000849 in words is "forty-two billion, five hundred fifty-six million, eight hundred forty-nine", and thus it is an aban number.