1205550140135 has 8 divisors (see below), whose sum is σ = 1578174728976. Its totient is φ = 876763738240.

The previous prime is 1205550140129. The next prime is 1205550140147. The reversal of 1205550140135 is 5310410555021.

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

It is not a de Polignac number, because 1205550140135 - 2¹⁰ = 1205550139111 is a prime.

It is a super-2 number, since 2×1205550140135² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10959546674 + ... + 10959546783.

It is an arithmetic number, because the mean of its divisors is an integer number (197271841122).

Almost surely, 2^{1205550140135} is an apocalyptic number.

1205550140135 is a deficient number, since it is larger than the sum of its proper divisors (372624588841).

1205550140135 is a wasteful number, since it uses less digits than its factorization.

1205550140135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21919093473.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 1205550140135 its reverse (5310410555021), we get a palindrome (6515960695156).

The spelling of 1205550140135 in words is "one trillion, two hundred five billion, five hundred fifty million, one hundred forty thousand, one hundred thirty-five".