2778352129087 has 2 divisors, whose sum is σ = 2778352129088. Its totient is φ = 2778352129086.

The previous prime is 2778352129081. The next prime is 2778352129097. The reversal of 2778352129087 is 7809212538772.

2778352129087 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778352129087 is a prime.

It is a super-2 number, since 2×2778352129087² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778352129081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389176064543 + 1389176064544.

It is an arithmetic number, because the mean of its divisors is an integer number (1389176064544).

Almost surely, 2^{2778352129087} is an apocalyptic number.

2778352129087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778352129087 is an equidigital number, since it uses as much as digits as its factorization.

2778352129087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 2778352129087 in words is "two trillion, seven hundred seventy-eight billion, three hundred fifty-two million, one hundred twenty-nine thousand, eighty-seven".