1389026252650 has 12 divisors (see below), whose sum is σ = 2583588830022. Its totient is φ = 555610501040.

The previous prime is 1389026252633. The next prime is 1389026252671. The reversal of 1389026252650 is 562526209831.

It can be written as a sum of positive squares in 3 ways, for example, as 1333556111209 + 55470141441 = 1154797^2 + 235521^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1389026252594 and 1389026252603.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13890262477 + ... + 13890262576.

Almost surely, 2^{1389026252650} is an apocalyptic number.

1389026252650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389026252650 is a deficient number, since it is larger than the sum of its proper divisors (1194562577372).

1389026252650 is a wasteful number, since it uses less digits than its factorization.

1389026252650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27780525065 (or 27780525060 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 1389026252650 in words is "one trillion, three hundred eighty-nine billion, twenty-six million, two hundred fifty-two thousand, six hundred fifty".