13585778377 has 2 divisors, whose sum is σ = 13585778378. Its totient is φ = 13585778376.

The previous prime is 13585778359. The next prime is 13585778417. The reversal of 13585778377 is 77387758531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11686474816 + 1899303561 = 108104^2 + 43581^2 .

It is a cyclic number.

It is not a de Polignac number, because 13585778377 - 2²³ = 13577389769 is a prime.

It is not a weakly prime, because it can be changed into another prime (13585778477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6792889188 + 6792889189.

It is an arithmetic number, because the mean of its divisors is an integer number (6792889189).

Almost surely, 2^13585778377 is an apocalyptic number.

It is an amenable number.

13585778377 is a deficient number, since it is larger than the sum of its proper divisors (1).

13585778377 is an equidigital number, since it uses as much as digits as its factorization.

13585778377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34574400, while the sum is 61.

The spelling of 13585778377 in words is "thirteen billion, five hundred eighty-five million, seven hundred seventy-eight thousand, three hundred seventy-seven".