42939995537 has 2 divisors, whose sum is σ = 42939995538. Its totient is φ = 42939995536.

The previous prime is 42939995519. The next prime is 42939995543. The reversal of 42939995537 is 73559993924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37106702161 + 5833293376 = 192631^2 + 76376^2 .

It is a cyclic number.

It is not a de Polignac number, because 42939995537 - 2¹² = 42939991441 is a prime.

It is not a weakly prime, because it can be changed into another prime (42939995507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21469997768 + 21469997769.

It is an arithmetic number, because the mean of its divisors is an integer number (21469997769).

Almost surely, 2^42939995537 is an apocalyptic number.

It is an amenable number.

42939995537 is a deficient number, since it is larger than the sum of its proper divisors (1).

42939995537 is an equidigital number, since it uses as much as digits as its factorization.

42939995537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82668600, while the sum is 65.

The spelling of 42939995537 in words is "forty-two billion, nine hundred thirty-nine million, nine hundred ninety-five thousand, five hundred thirty-seven".