42536999957 has 2 divisors, whose sum is σ = 42536999958. Its totient is φ = 42536999956.

The previous prime is 42536999899. The next prime is 42536999971. The reversal of 42536999957 is 75999963524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41196414961 + 1340584996 = 202969^2 + 36614^2 .

It is a cyclic number.

It is not a de Polignac number, because 42536999957 - 2⁶ = 42536999893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42536999977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21268499978 + 21268499979.

It is an arithmetic number, because the mean of its divisors is an integer number (21268499979).

Almost surely, 2^42536999957 is an apocalyptic number.

It is an amenable number.

42536999957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42536999957 is an equidigital number, since it uses as much as digits as its factorization.

42536999957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165337200, while the sum is 68.

Adding to 42536999957 its sum of digits (68), we get a square (42537000025 = 206245²).

The spelling of 42536999957 in words is "forty-two billion, five hundred thirty-six million, nine hundred ninety-nine thousand, nine hundred fifty-seven".