61606426237 has 2 divisors, whose sum is σ = 61606426238. Its totient is φ = 61606426236.

The previous prime is 61606426207. The next prime is 61606426243. The reversal of 61606426237 is 73262460616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35900396676 + 25706029561 = 189474^2 + 160331^2 .

It is a cyclic number.

It is not a de Polignac number, because 61606426237 - 2¹¹ = 61606424189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61606426193 and 61606426202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61606426207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803213118 + 30803213119.

It is an arithmetic number, because the mean of its divisors is an integer number (30803213119).

Almost surely, 2^61606426237 is an apocalyptic number.

It is an amenable number.

61606426237 is a deficient number, since it is larger than the sum of its proper divisors (1).

61606426237 is an equidigital number, since it uses as much as digits as its factorization.

61606426237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 61606426237 in words is "sixty-one billion, six hundred six million, four hundred twenty-six thousand, two hundred thirty-seven".