42043339957 has 2 divisors, whose sum is σ = 42043339958. Its totient is φ = 42043339956.

The previous prime is 42043339951. The next prime is 42043340023. The reversal of 42043339957 is 75993334024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31057365361 + 10985974596 = 176231^2 + 104814^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043339957 - 2¹¹ = 42043337909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42043339957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42043339951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021669978 + 21021669979.

It is an arithmetic number, because the mean of its divisors is an integer number (21021669979).

Almost surely, 2^42043339957 is an apocalyptic number.

It is an amenable number.

42043339957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043339957 is an equidigital number, since it uses as much as digits as its factorization.

42043339957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 49.

The spelling of 42043339957 in words is "forty-two billion, forty-three million, three hundred thirty-nine thousand, nine hundred fifty-seven".