1381355085608 has 8 divisors (see below), whose sum is σ = 2590040785530. Its totient is φ = 690677542800.

The previous prime is 1381355085571. The next prime is 1381355085673. The reversal of 1381355085608 is 8065805531831.

It can be written as a sum of positive squares in only one way, i.e., 1021712596804 + 359642488804 = 1010798^2 + 599702^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1381355085608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86334692843 + ... + 86334692858.

Almost surely, 2^{1381355085608} is an apocalyptic number.

It is an amenable number.

1381355085608 is a deficient number, since it is larger than the sum of its proper divisors (1208685699922).

1381355085608 is a wasteful number, since it uses less digits than its factorization.

1381355085608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172669385707 (or 172669385703 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 1381355085608 in words is "one trillion, three hundred eighty-one billion, three hundred fifty-five million, eighty-five thousand, six hundred eight".