1205145235155 has 16 divisors (see below), whose sum is σ = 1939004628480. Its totient is φ = 639153374688.

The previous prime is 1205145235097. The next prime is 1205145235169. The reversal of 1205145235155 is 5515325415021.

It is not a de Polignac number, because 1205145235155 - 2²⁰ = 1205144186579 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224419147 + ... + 224424516.

It is an arithmetic number, because the mean of its divisors is an integer number (121187789280).

Almost surely, 2^{1205145235155} is an apocalyptic number.

1205145235155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1205145235155 is a deficient number, since it is larger than the sum of its proper divisors (733859393325).

1205145235155 is a wasteful number, since it uses less digits than its factorization.

1205145235155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448843850.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 1205145235155 in words is "one trillion, two hundred five billion, one hundred forty-five million, two hundred thirty-five thousand, one hundred fifty-five".