61273707251 has 2 divisors, whose sum is σ = 61273707252. Its totient is φ = 61273707250.

The previous prime is 61273707247. The next prime is 61273707343. The reversal of 61273707251 is 15270737216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61273707251 - 2² = 61273707247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61273707199 and 61273707208.

It is not a weakly prime, because it can be changed into another prime (61273707211) 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, 30636853625 + 30636853626.

It is an arithmetic number, because the mean of its divisors is an integer number (30636853626).

Almost surely, 2^61273707251 is an apocalyptic number.

61273707251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61273707251 is an equidigital number, since it uses as much as digits as its factorization.

61273707251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 61273707251 in words is "sixty-one billion, two hundred seventy-three million, seven hundred seven thousand, two hundred fifty-one".