1387209706560 has 336 divisors, whose sum is σ = 4966083210816. Its totient is φ = 368581404672.

The previous prime is 1387209706499. The next prime is 1387209706577. The reversal of 1387209706560 is 656079027831.

1387209706560 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 2 + 0 + 9 + 70 + 6 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1387209706497 and 1387209706506.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21507319 + ... + 21571721.

It is an arithmetic number, because the mean of its divisors is an integer number (14780009556).

Almost surely, 2^{1387209706560} is an apocalyptic number.

1387209706560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387209706560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2483041605408).

1387209706560 is an abundant number, since it is smaller than the sum of its proper divisors (3578873504256).

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

1387209706560 is an equidigital number, since it uses as much as digits as its factorization.

1387209706560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64712 (or 64690 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 1387209706560 in words is "one trillion, three hundred eighty-seven billion, two hundred nine million, seven hundred six thousand, five hundred sixty".