1255512323543 has 8 divisors (see below), whose sum is σ = 1256759403648. Its totient is φ = 1254265425504.

The previous prime is 1255512323497. The next prime is 1255512323557. The reversal of 1255512323543 is 3453232155521.

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

It is a cyclic number.

It is not a de Polignac number, because 1255512323543 - 2⁸ = 1255512323287 is a prime.

It is a super-2 number, since 2×1255512323543² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255512323543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255512322543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16809146 + ... + 16883672.

It is an arithmetic number, because the mean of its divisors is an integer number (157094925456).

Almost surely, 2^{1255512323543} is an apocalyptic number.

1255512323543 is a deficient number, since it is larger than the sum of its proper divisors (1247080105).

1255512323543 is a wasteful number, since it uses less digits than its factorization.

1255512323543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91033.

The product of its digits is 540000, while the sum is 41.

The spelling of 1255512323543 in words is "one trillion, two hundred fifty-five billion, five hundred twelve million, three hundred twenty-three thousand, five hundred forty-three".