51214647786461 has 2 divisors, whose sum is σ = 51214647786462. Its totient is φ = 51214647786460.

The previous prime is 51214647786433. The next prime is 51214647786499. The reversal of 51214647786461 is 16468774641215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50391626874436 + 823020912025 = 7098706^2 + 907205^2 .

It is a cyclic number.

It is not a de Polignac number, because 51214647786461 - 2⁶ = 51214647786397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51214647786394 and 51214647786403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51214947786461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25607323893230 + 25607323893231.

It is an arithmetic number, because the mean of its divisors is an integer number (25607323893231).

Almost surely, 2^{51214647786461} is an apocalyptic number.

It is an amenable number.

51214647786461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51214647786461 is an equidigital number, since it uses as much as digits as its factorization.

51214647786461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54190080, while the sum is 62.

The spelling of 51214647786461 in words is "fifty-one trillion, two hundred fourteen billion, six hundred forty-seven million, seven hundred eighty-six thousand, four hundred sixty-one".