51154735551461 has 2 divisors, whose sum is σ = 51154735551462. Its totient is φ = 51154735551460.

The previous prime is 51154735551421. The next prime is 51154735551467. The reversal of 51154735551461 is 16415553745115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31239883240225 + 19914852311236 = 5589265^2 + 4462606^2 .

It is a cyclic number.

It is not a de Polignac number, because 51154735551461 - 2¹⁴ = 51154735535077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51154735551467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577367775730 + 25577367775731.

It is an arithmetic number, because the mean of its divisors is an integer number (25577367775731).

Almost surely, 2^{51154735551461} is an apocalyptic number.

It is an amenable number.

51154735551461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51154735551461 is an equidigital number, since it uses as much as digits as its factorization.

51154735551461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300000, while the sum is 53.

The spelling of 51154735551461 in words is "fifty-one trillion, one hundred fifty-four billion, seven hundred thirty-five million, five hundred fifty-one thousand, four hundred sixty-one".