42686615513 has 2 divisors, whose sum is σ = 42686615514. Its totient is φ = 42686615512.

The previous prime is 42686615471. The next prime is 42686615539. The reversal of 42686615513 is 31551668624.

42686615513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40165370569 + 2521244944 = 200413^2 + 50212^2 .

It is a cyclic number.

It is not a de Polignac number, because 42686615513 - 2¹⁶ = 42686549977 is a prime.

It is a super-3 number, since 3×42686615513³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42686615113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21343307756 + 21343307757.

It is an arithmetic number, because the mean of its divisors is an integer number (21343307757).

Almost surely, 2^42686615513 is an apocalyptic number.

It is an amenable number.

42686615513 is a deficient number, since it is larger than the sum of its proper divisors (1).

42686615513 is an equidigital number, since it uses as much as digits as its factorization.

42686615513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 47.

The spelling of 42686615513 in words is "forty-two billion, six hundred eighty-six million, six hundred fifteen thousand, five hundred thirteen".