1389026252649 has 16 divisors (see below), whose sum is σ = 2168236103040. Its totient is φ = 774370035840.

The previous prime is 1389026252633. The next prime is 1389026252671. The reversal of 1389026252649 is 9462526209831.

It is not a de Polignac number, because 1389026252649 - 2⁴ = 1389026252633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1389026252609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806634594 + ... + 806636315.

It is an arithmetic number, because the mean of its divisors is an integer number (135514756440).

Almost surely, 2^{1389026252649} is an apocalyptic number.

It is an amenable number.

1389026252649 is a deficient number, since it is larger than the sum of its proper divisors (779209850391).

1389026252649 is a wasteful number, since it uses less digits than its factorization.

1389026252649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613270960.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 1389026252649 in words is "one trillion, three hundred eighty-nine billion, twenty-six million, two hundred fifty-two thousand, six hundred forty-nine".