51611562130399 has 2 divisors, whose sum is σ = 51611562130400. Its totient is φ = 51611562130398.

The previous prime is 51611562130367. The next prime is 51611562130417. The reversal of 51611562130399 is 99303126511615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51611562130399 - 2⁵ = 51611562130367 is a prime.

It is a super-3 number, since 3×51611562130399³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51611562130199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25805781065199 + 25805781065200.

It is an arithmetic number, because the mean of its divisors is an integer number (25805781065200).

Almost surely, 2^{51611562130399} is an apocalyptic number.

51611562130399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51611562130399 is an equidigital number, since it uses as much as digits as its factorization.

51611562130399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1312200, while the sum is 52.

The spelling of 51611562130399 in words is "fifty-one trillion, six hundred eleven billion, five hundred sixty-two million, one hundred thirty thousand, three hundred ninety-nine".