2635878685493 has 2 divisors, whose sum is σ = 2635878685494. Its totient is φ = 2635878685492.

The previous prime is 2635878685469. The next prime is 2635878685519. The reversal of 2635878685493 is 3945868785362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2552459960164 + 83418725329 = 1597642^2 + 288823^2 .

It is a cyclic number.

It is not a de Polignac number, because 2635878685493 - 2¹⁰ = 2635878684469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2635878685493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2635878085493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317939342746 + 1317939342747.

It is an arithmetic number, because the mean of its divisors is an integer number (1317939342747).

Almost surely, 2^{2635878685493} is an apocalyptic number.

It is an amenable number.

2635878685493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2635878685493 is an equidigital number, since it uses as much as digits as its factorization.

2635878685493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2090188800, while the sum is 74.

The spelling of 2635878685493 in words is "two trillion, six hundred thirty-five billion, eight hundred seventy-eight million, six hundred eighty-five thousand, four hundred ninety-three".