51897523877 has 2 divisors, whose sum is σ = 51897523878. Its totient is φ = 51897523876.

The previous prime is 51897523813. The next prime is 51897523921. The reversal of 51897523877 is 77832579815.

51897523877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40738981921 + 11158541956 = 201839^2 + 105634^2 .

It is a cyclic number.

It is not a de Polignac number, because 51897523877 - 2⁶ = 51897523813 is a prime.

It is a super-2 number, since 2×51897523877² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51897523477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25948761938 + 25948761939.

It is an arithmetic number, because the mean of its divisors is an integer number (25948761939).

Almost surely, 2^51897523877 is an apocalyptic number.

It is an amenable number.

51897523877 is a deficient number, since it is larger than the sum of its proper divisors (1).

51897523877 is an equidigital number, since it uses as much as digits as its factorization.

51897523877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29635200, while the sum is 62.

The spelling of 51897523877 in words is "fifty-one billion, eight hundred ninety-seven million, five hundred twenty-three thousand, eight hundred seventy-seven".