2635487567989 has 2 divisors, whose sum is σ = 2635487567990. Its totient is φ = 2635487567988.

The previous prime is 2635487567963. The next prime is 2635487568001. The reversal of 2635487567989 is 9897657845362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2063724745489 + 571762822500 = 1436567^2 + 756150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2635487567989 - 2⁵ = 2635487567957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2635487567389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317743783994 + 1317743783995.

It is an arithmetic number, because the mean of its divisors is an integer number (1317743783995).

Almost surely, 2^{2635487567989} is an apocalyptic number.

It is an amenable number.

2635487567989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2635487567989 is an equidigital number, since it uses as much as digits as its factorization.

2635487567989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5486745600, while the sum is 79.

The spelling of 2635487567989 in words is "two trillion, six hundred thirty-five billion, four hundred eighty-seven million, five hundred sixty-seven thousand, nine hundred eighty-nine".