51235976789 has 2 divisors, whose sum is σ = 51235976790. Its totient is φ = 51235976788.

The previous prime is 51235976767. The next prime is 51235976807. The reversal of 51235976789 is 98767953215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50258914225 + 977062564 = 224185^2 + 31258^2 .

It is a cyclic number.

It is not a de Polignac number, because 51235976789 - 2²⁴ = 51219199573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51235976719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617988394 + 25617988395.

It is an arithmetic number, because the mean of its divisors is an integer number (25617988395).

Almost surely, 2^51235976789 is an apocalyptic number.

It is an amenable number.

51235976789 is a deficient number, since it is larger than the sum of its proper divisors (1).

51235976789 is an equidigital number, since it uses as much as digits as its factorization.

51235976789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 62.

The spelling of 51235976789 in words is "fifty-one billion, two hundred thirty-five million, nine hundred seventy-six thousand, seven hundred eighty-nine".