1390138763764 has 6 divisors (see below), whose sum is σ = 2432742836594. Its totient is φ = 695069381880.

The previous prime is 1390138763759. The next prime is 1390138763851. The reversal of 1390138763764 is 4673678310931.

It can be written as a sum of positive squares in only one way, i.e., 939484332900 + 450654430864 = 969270^2 + 671308^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1390138763699 and 1390138763708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173767345467 + ... + 173767345474.

Almost surely, 2^{1390138763764} is an apocalyptic number.

It is an amenable number.

1390138763764 is a deficient number, since it is larger than the sum of its proper divisors (1042604072830).

1390138763764 is a wasteful number, since it uses less digits than its factorization.

1390138763764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347534690945 (or 347534690943 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 58.

The spelling of 1390138763764 in words is "one trillion, three hundred ninety billion, one hundred thirty-eight million, seven hundred sixty-three thousand, seven hundred sixty-four".