42513831617 has 2 divisors, whose sum is σ = 42513831618. Its totient is φ = 42513831616.

The previous prime is 42513831491. The next prime is 42513831697. The reversal of 42513831617 is 71613831524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34673791681 + 7840039936 = 186209^2 + 88544^2 .

It is a cyclic number.

It is not a de Polignac number, because 42513831617 - 2¹⁴ = 42513815233 is a prime.

It is not a weakly prime, because it can be changed into another prime (42513831697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21256915808 + 21256915809.

It is an arithmetic number, because the mean of its divisors is an integer number (21256915809).

Almost surely, 2^42513831617 is an apocalyptic number.

It is an amenable number.

42513831617 is a deficient number, since it is larger than the sum of its proper divisors (1).

42513831617 is an equidigital number, since it uses as much as digits as its factorization.

42513831617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The spelling of 42513831617 in words is "forty-two billion, five hundred thirteen million, eight hundred thirty-one thousand, six hundred seventeen".