1388258081777 has 16 divisors (see below), whose sum is σ = 1639965130752. Its totient is φ = 1150000482960.

The previous prime is 1388258081753. The next prime is 1388258081801. The reversal of 1388258081777 is 7771808528831.

It is an interprime number because it is at equal distance from previous prime (1388258081753) and next prime (1388258081801).

It is not a de Polignac number, because 1388258081777 - 2¹⁴ = 1388258065393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388258081677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4143953 + ... + 4466414.

It is an arithmetic number, because the mean of its divisors is an integer number (102497820672).

Almost surely, 2^{1388258081777} is an apocalyptic number.

It is an amenable number.

1388258081777 is a deficient number, since it is larger than the sum of its proper divisors (251707048975).

1388258081777 is an equidigital number, since it uses as much as digits as its factorization.

1388258081777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611148.

The product of its (nonzero) digits is 42147840, while the sum is 65.

The spelling of 1388258081777 in words is "one trillion, three hundred eighty-eight billion, two hundred fifty-eight million, eighty-one thousand, seven hundred seventy-seven".