61477376306251 has 2 divisors, whose sum is σ = 61477376306252. Its totient is φ = 61477376306250.

The previous prime is 61477376306201. The next prime is 61477376306309. The reversal of 61477376306251 is 15260367377416.

It is a happy number.

It is an a-pointer prime, because the next prime (61477376306309) can be obtained adding 61477376306251 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61477376306251 - 2¹⁵ = 61477376273483 is a prime.

It is not a weakly prime, because it can be changed into another prime (61477376306201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30738688153125 + 30738688153126.

It is an arithmetic number, because the mean of its divisors is an integer number (30738688153126).

Almost surely, 2^{61477376306251} is an apocalyptic number.

61477376306251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61477376306251 is an equidigital number, since it uses as much as digits as its factorization.

61477376306251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26671680, while the sum is 58.

The spelling of 61477376306251 in words is "sixty-one trillion, four hundred seventy-seven billion, three hundred seventy-six million, three hundred six thousand, two hundred fifty-one".