51601210811 has 2 divisors, whose sum is σ = 51601210812. Its totient is φ = 51601210810.

The previous prime is 51601210789. The next prime is 51601210847. The reversal of 51601210811 is 11801210615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51601210811 - 2³⁴ = 34421341627 is a prime.

It is a super-2 number, since 2×51601210811² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51601215811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25800605405 + 25800605406.

It is an arithmetic number, because the mean of its divisors is an integer number (25800605406).

Almost surely, 2^51601210811 is an apocalyptic number.

51601210811 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601210811 is an equidigital number, since it uses as much as digits as its factorization.

51601210811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 26.

The spelling of 51601210811 in words is "fifty-one billion, six hundred one million, two hundred ten thousand, eight hundred eleven".