2685498820957 has 2 divisors, whose sum is σ = 2685498820958. Its totient is φ = 2685498820956.

The previous prime is 2685498820891. The next prime is 2685498820993. The reversal of 2685498820957 is 7590288945862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2401821147961 + 283677672996 = 1549781^2 + 532614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685498820957 - 2¹¹ = 2685498818909 is a prime.

It is a super-2 number, since 2×2685498820957² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2685498820957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2685498820057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342749410478 + 1342749410479.

It is an arithmetic number, because the mean of its divisors is an integer number (1342749410479).

Almost surely, 2^{2685498820957} is an apocalyptic number.

It is an amenable number.

2685498820957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685498820957 is an equidigital number, since it uses as much as digits as its factorization.

2685498820957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 696729600, while the sum is 73.

The spelling of 2685498820957 in words is "two trillion, six hundred eighty-five billion, four hundred ninety-eight million, eight hundred twenty thousand, nine hundred fifty-seven".