1255135515320 has 16 divisors (see below), whose sum is σ = 2824054909560. Its totient is φ = 502054206112.

The previous prime is 1255135515301. The next prime is 1255135515323. The reversal of 1255135515320 is 235155315521.

It is a super-3 number, since 3×1255135515320³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255135515323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15689193902 + ... + 15689193981.

Almost surely, 2^{1255135515320} is an apocalyptic number.

1255135515320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255135515320 is an abundant number, since it is smaller than the sum of its proper divisors (1568919394240).

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

1255135515320 is a wasteful number, since it uses less digits than its factorization.

1255135515320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31378387894 (or 31378387890 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 1255135515320 in words is "one trillion, two hundred fifty-five billion, one hundred thirty-five million, five hundred fifteen thousand, three hundred twenty".