1389649599556 has 27 divisors (see below), whose sum is σ = 2438327857567. Its totient is φ = 692989355240.

The previous prime is 1389649599553. The next prime is 1389649599577. The reversal of 1389649599556 is 6559959469831.

The square root of 1389649599556 is 1178834.

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

It is a super-2 number, since 2×1389649599556² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389649599553) 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, 1525410741 + ... + 1525411651.

Almost surely, 2^{1389649599556} is an apocalyptic number.

1389649599556 is the 1178834-th square number.

It is an amenable number.

1389649599556 is a deficient number, since it is larger than the sum of its proper divisors (1048678258011).

1389649599556 is an frugal number, since it uses more digits than its factorization.

1389649599556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120 (or 1560 counting only the distinct ones).

The product of its digits is 2834352000, while the sum is 79.

The spelling of 1389649599556 in words is "one trillion, three hundred eighty-nine billion, six hundred forty-nine million, five hundred ninety-nine thousand, five hundred fifty-six".