1389799922660 has 24 divisors (see below), whose sum is σ = 2919395006136. Its totient is φ = 555764698880.

The previous prime is 1389799922633. The next prime is 1389799922663. The reversal of 1389799922660 is 662299979831.

It can be written as a sum of positive squares in 4 ways, for example, as 437786015716 + 952013906944 = 661654^2 + 975712^2 .

It is not an unprimeable number, because it can be changed into a prime (1389799922663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9630977 + ... + 9774216.

It is an arithmetic number, because the mean of its divisors is an integer number (121641458589).

Almost surely, 2^{1389799922660} is an apocalyptic number.

1389799922660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389799922660 is an abundant number, since it is smaller than the sum of its proper divisors (1529595083476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389799922660 is a wasteful number, since it uses less digits than its factorization.

1389799922660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19408783 (or 19408781 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 71.

The spelling of 1389799922660 in words is "one trillion, three hundred eighty-nine billion, seven hundred ninety-nine million, nine hundred twenty-two thousand, six hundred sixty".