1381770955805 has 8 divisors (see below), whose sum is σ = 1658605923000. Its totient is φ = 1105096247296.

The previous prime is 1381770955783. The next prime is 1381770955811. The reversal of 1381770955805 is 5085590771831.

It can be written as a sum of positive squares in 4 ways, for example, as 179270100409 + 1202500855396 = 423403^2 + 1096586^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381770955805 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40045700 + ... + 40080189.

It is an arithmetic number, because the mean of its divisors is an integer number (207325740375).

Almost surely, 2^{1381770955805} is an apocalyptic number.

It is an amenable number.

1381770955805 is a deficient number, since it is larger than the sum of its proper divisors (276834967195).

1381770955805 is an equidigital number, since it uses as much as digits as its factorization.

1381770955805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80129343.

The product of its (nonzero) digits is 10584000, while the sum is 59.

The spelling of 1381770955805 in words is "one trillion, three hundred eighty-one billion, seven hundred seventy million, nine hundred fifty-five thousand, eight hundred five".