51892420609 has 2 divisors, whose sum is σ = 51892420610. Its totient is φ = 51892420608.

The previous prime is 51892420607. The next prime is 51892420649. The reversal of 51892420609 is 90602429815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43996321009 + 7896099600 = 209753^2 + 88860^2 .

It is a cyclic number.

It is not a de Polignac number, because 51892420609 - 2¹ = 51892420607 is a prime.

It is a super-2 number, since 2×51892420609² (a number of 22 digits) contains 22 as substring.

Together with 51892420607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51892420603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25946210304 + 25946210305.

It is an arithmetic number, because the mean of its divisors is an integer number (25946210305).

Almost surely, 2^51892420609 is an apocalyptic number.

It is an amenable number.

51892420609 is a deficient number, since it is larger than the sum of its proper divisors (1).

51892420609 is an equidigital number, since it uses as much as digits as its factorization.

51892420609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 51892420609 in words is "fifty-one billion, eight hundred ninety-two million, four hundred twenty thousand, six hundred nine".