61425836137 has 2 divisors, whose sum is σ = 61425836138. Its totient is φ = 61425836136.

The previous prime is 61425836113. The next prime is 61425836141. The reversal of 61425836137 is 73163852416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52487268201 + 8938567936 = 229101^2 + 94544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61425836137 is a prime.

It is not a weakly prime, because it can be changed into another prime (61425836737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30712918068 + 30712918069.

It is an arithmetic number, because the mean of its divisors is an integer number (30712918069).

Almost surely, 2^61425836137 is an apocalyptic number.

It is an amenable number.

61425836137 is a deficient number, since it is larger than the sum of its proper divisors (1).

61425836137 is an equidigital number, since it uses as much as digits as its factorization.

61425836137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The spelling of 61425836137 in words is "sixty-one billion, four hundred twenty-five million, eight hundred thirty-six thousand, one hundred thirty-seven".