42901555049 has 2 divisors, whose sum is σ = 42901555050. Its totient is φ = 42901555048.

The previous prime is 42901555003. The next prime is 42901555051. The reversal of 42901555049 is 94055510924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30330660649 + 12570894400 = 174157^2 + 112120^2 .

It is a cyclic number.

It is not a de Polignac number, because 42901555049 - 2²⁸ = 42633119593 is a prime.

Together with 42901555051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42901555549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21450777524 + 21450777525.

It is an arithmetic number, because the mean of its divisors is an integer number (21450777525).

Almost surely, 2^42901555049 is an apocalyptic number.

It is an amenable number.

42901555049 is a deficient number, since it is larger than the sum of its proper divisors (1).

42901555049 is an equidigital number, since it uses as much as digits as its factorization.

42901555049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 42901555049 in words is "forty-two billion, nine hundred one million, five hundred fifty-five thousand, forty-nine".