1388776377764 has 6 divisors (see below), whose sum is σ = 2430358661094. Its totient is φ = 694388188880.

The previous prime is 1388776377757. The next prime is 1388776377817. The reversal of 1388776377764 is 4677736778831.

It can be written as a sum of positive squares in only one way, i.e., 1385781004864 + 2995372900 = 1177192^2 + 54730^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1388776377691 and 1388776377700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173597047217 + ... + 173597047224.

It is an arithmetic number, because the mean of its divisors is an integer number (405059776849).

Almost surely, 2^{1388776377764} is an apocalyptic number.

It is an amenable number.

1388776377764 is a deficient number, since it is larger than the sum of its proper divisors (1041582283330).

1388776377764 is a wasteful number, since it uses less digits than its factorization.

1388776377764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347194094445 (or 347194094443 counting only the distinct ones).

The product of its digits is 1394039808, while the sum is 74.

The spelling of 1388776377764 in words is "one trillion, three hundred eighty-eight billion, seven hundred seventy-six million, three hundred seventy-seven thousand, seven hundred sixty-four".