1355431543245 has 24 divisors (see below), whose sum is σ = 2530138881816. Its totient is φ = 667289374848.

The previous prime is 1355431543237. The next prime is 1355431543273. The reversal of 1355431543245 is 5423451345531.

1355431543245 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 4 + 315 + 4 + 324 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 241821996516 + 1113609546729 = 491754^2 + 1055277^2 .

It is not a de Polignac number, because 1355431543245 - 2³ = 1355431543237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1355431543245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1158487914 + ... + 1158489083.

It is an arithmetic number, because the mean of its divisors is an integer number (105422453409).

Almost surely, 2^{1355431543245} is an apocalyptic number.

1355431543245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1355431543245 is a deficient number, since it is larger than the sum of its proper divisors (1174707338571).

1355431543245 is a wasteful number, since it uses less digits than its factorization.

1355431543245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316977021 (or 2316977018 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 45.

Adding to 1355431543245 its reverse (5423451345531), we get a palindrome (6778882888776).

The spelling of 1355431543245 in words is "one trillion, three hundred fifty-five billion, four hundred thirty-one million, five hundred forty-three thousand, two hundred forty-five".