52782507821 has 2 divisors, whose sum is σ = 52782507822. Its totient is φ = 52782507820.

The previous prime is 52782507763. The next prime is 52782507871. The reversal of 52782507821 is 12870528725.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52036453225 + 746054596 = 228115^2 + 27314^2 .

It is a cyclic number.

It is not a de Polignac number, because 52782507821 - 2²² = 52778313517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52782507871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26391253910 + 26391253911.

It is an arithmetic number, because the mean of its divisors is an integer number (26391253911).

Almost surely, 2^52782507821 is an apocalyptic number.

It is an amenable number.

52782507821 is a deficient number, since it is larger than the sum of its proper divisors (1).

52782507821 is an equidigital number, since it uses as much as digits as its factorization.

52782507821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 52782507821 in words is "fifty-two billion, seven hundred eighty-two million, five hundred seven thousand, eight hundred twenty-one".