1378362877369 has 9 divisors (see below), whose sum is σ = 1464233670381. Its totient is φ = 1297263923520.

The previous prime is 1378362877291. The next prime is 1378362877427. The reversal of 1378362877369 is 9637782638731.

The square root of 1378362877369 is 1174037.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 265312557225 + 1113050320144 = 515085^2 + 1055012^2 .

It is not a de Polignac number, because 1378362877369 - 2⁹ = 1378362876857 is a prime.

It is a super-2 number, since 2×1378362877369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378362877298 and 1378362877307.

It is not an unprimeable number, because it can be changed into a prime (1378362877069) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19924099 + ... + 19993159.

Almost surely, 2^{1378362877369} is an apocalyptic number.

1378362877369 is the 1174037-th square number.

1378362877369 is the 587019-th centered octagonal number.

It is an amenable number.

1378362877369 is a deficient number, since it is larger than the sum of its proper divisors (85870793012).

1378362877369 is an frugal number, since it uses more digits than its factorization.

1378362877369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138156 (or 69078 counting only the distinct ones).

The product of its digits is 384072192, while the sum is 70.

The spelling of 1378362877369 in words is "one trillion, three hundred seventy-eight billion, three hundred sixty-two million, eight hundred seventy-seven thousand, three hundred sixty-nine".