52478651881 has 2 divisors, whose sum is σ = 52478651882. Its totient is φ = 52478651880.

The previous prime is 52478651777. The next prime is 52478651893. The reversal of 52478651881 is 18815687425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46562734656 + 5915917225 = 215784^2 + 76915^2 .

It is a cyclic number.

It is not a de Polignac number, because 52478651881 - 2⁹ = 52478651369 is a prime.

It is a super-2 number, since 2×52478651881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52475651881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26239325940 + 26239325941.

It is an arithmetic number, because the mean of its divisors is an integer number (26239325941).

Almost surely, 2^52478651881 is an apocalyptic number.

It is an amenable number.

52478651881 is a deficient number, since it is larger than the sum of its proper divisors (1).

52478651881 is an equidigital number, since it uses as much as digits as its factorization.

52478651881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4300800, while the sum is 55.

The spelling of 52478651881 in words is "fifty-two billion, four hundred seventy-eight million, six hundred fifty-one thousand, eight hundred eighty-one".