51436541857189 has 2 divisors, whose sum is σ = 51436541857190. Its totient is φ = 51436541857188.

The previous prime is 51436541857157. The next prime is 51436541857291. The reversal of 51436541857189 is 98175814563415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42694070764900 + 8742471092289 = 6534070^2 + 2956767^2 .

It is a cyclic number.

It is not a de Polignac number, because 51436541857189 - 2⁵ = 51436541857157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51436541827189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25718270928594 + 25718270928595.

It is an arithmetic number, because the mean of its divisors is an integer number (25718270928595).

Almost surely, 2^{51436541857189} is an apocalyptic number.

It is an amenable number.

51436541857189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51436541857189 is an equidigital number, since it uses as much as digits as its factorization.

51436541857189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152000, while the sum is 67.

The spelling of 51436541857189 in words is "fifty-one trillion, four hundred thirty-six billion, five hundred forty-one million, eight hundred fifty-seven thousand, one hundred eighty-nine".