1388777652775 has 12 divisors (see below), whose sum is σ = 1724921349952. Its totient is φ = 1109191760640.

The previous prime is 1388777652763. The next prime is 1388777652793. The reversal of 1388777652775 is 5772567778831.

It is not a de Polignac number, because 1388777652775 - 2⁹ = 1388777652263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388777652698 and 1388777652707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45743562 + ... + 45773911.

Almost surely, 2^{1388777652775} is an apocalyptic number.

1388777652775 is a deficient number, since it is larger than the sum of its proper divisors (336143697177).

1388777652775 is an equidigital number, since it uses as much as digits as its factorization.

1388777652775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91518090 (or 91518085 counting only the distinct ones).

The product of its digits is 968083200, while the sum is 73.

The spelling of 1388777652775 in words is "one trillion, three hundred eighty-eight billion, seven hundred seventy-seven million, six hundred fifty-two thousand, seven hundred seventy-five".