52780919669 has 2 divisors, whose sum is σ = 52780919670. Its totient is φ = 52780919668.

The previous prime is 52780919657. The next prime is 52780919699. The reversal of 52780919669 is 96691908725.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51966673444 + 814246225 = 227962^2 + 28535^2 .

It is a cyclic number.

It is not a de Polignac number, because 52780919669 - 2³² = 48485952373 is a prime.

It is a super-4 number, since 4×52780919669⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52780919629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26390459834 + 26390459835.

It is an arithmetic number, because the mean of its divisors is an integer number (26390459835).

Almost surely, 2^52780919669 is an apocalyptic number.

It is an amenable number.

52780919669 is a deficient number, since it is larger than the sum of its proper divisors (1).

52780919669 is an equidigital number, since it uses as much as digits as its factorization.

52780919669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 52780919669 in words is "fifty-two billion, seven hundred eighty million, nine hundred nineteen thousand, six hundred sixty-nine".