1380506389705 has 8 divisors (see below), whose sum is σ = 1656613990152. Its totient is φ = 1104400896768.

The previous prime is 1380506389697. The next prime is 1380506389711. The reversal of 1380506389705 is 5079836050831.

It can be written as a sum of positive squares in 4 ways, for example, as 954278904384 + 426227485321 = 976872^2 + 652861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1380506389705 - 2³ = 1380506389697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2158209 + ... + 2723761.

It is an arithmetic number, because the mean of its divisors is an integer number (207076748769).

Almost surely, 2^{1380506389705} is an apocalyptic number.

It is an amenable number.

1380506389705 is a deficient number, since it is larger than the sum of its proper divisors (276107600447).

1380506389705 is an equidigital number, since it uses as much as digits as its factorization.

1380506389705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053755.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 1380506389705 in words is "one trillion, three hundred eighty billion, five hundred six million, three hundred eighty-nine thousand, seven hundred five".