61268042519 has 2 divisors, whose sum is σ = 61268042520. Its totient is φ = 61268042518.

The previous prime is 61268042501. The next prime is 61268042569. The reversal of 61268042519 is 91524086216.

61268042519 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61268042519 - 2⁸ = 61268042263 is a prime.

It is a super-2 number, since 2×61268042519² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61268042519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61268042569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30634021259 + 30634021260.

It is an arithmetic number, because the mean of its divisors is an integer number (30634021260).

Almost surely, 2^61268042519 is an apocalyptic number.

61268042519 is a deficient number, since it is larger than the sum of its proper divisors (1).

61268042519 is an equidigital number, since it uses as much as digits as its factorization.

61268042519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 61268042519 in words is "sixty-one billion, two hundred sixty-eight million, forty-two thousand, five hundred nineteen".