820057525379 has 2 divisors, whose sum is σ = 820057525380. Its totient is φ = 820057525378.

The previous prime is 820057525373. The next prime is 820057525381. The reversal of 820057525379 is 973525750028.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820057525379 is a prime.

Together with 820057525381, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 820057525379.

It is not a weakly prime, because it can be changed into another prime (820057525373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410028762689 + 410028762690.

It is an arithmetic number, because the mean of its divisors is an integer number (410028762690).

Almost surely, 2^820057525379 is an apocalyptic number.

820057525379 is a deficient number, since it is larger than the sum of its proper divisors (1).

820057525379 is an equidigital number, since it uses as much as digits as its factorization.

820057525379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 820057525379 in words is "eight hundred twenty billion, fifty-seven million, five hundred twenty-five thousand, three hundred seventy-nine".