4069387778749 has 2 divisors, whose sum is σ = 4069387778750. Its totient is φ = 4069387778748.

The previous prime is 4069387778711. The next prime is 4069387778767. The reversal of 4069387778749 is 9478777839604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3679805831524 + 389581947225 = 1918282^2 + 624165^2 .

It is a cyclic number.

It is not a de Polignac number, because 4069387778749 - 2³⁹ = 3519631964861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4069387748749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2034693889374 + 2034693889375.

It is an arithmetic number, because the mean of its divisors is an integer number (2034693889375).

Almost surely, 2^{4069387778749} is an apocalyptic number.

It is an amenable number.

4069387778749 is a deficient number, since it is larger than the sum of its proper divisors (1).

4069387778749 is an equidigital number, since it uses as much as digits as its factorization.

4069387778749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584673792, while the sum is 79.

The spelling of 4069387778749 in words is "four trillion, sixty-nine billion, three hundred eighty-seven million, seven hundred seventy-eight thousand, seven hundred forty-nine".