1225653123543 has 32 divisors (see below), whose sum is σ = 1747016957952. Its totient is φ = 762439392000.

The previous prime is 1225653123517. The next prime is 1225653123557. The reversal of 1225653123543 is 3453213565221.

It is not a de Polignac number, because 1225653123543 - 2⁹ = 1225653123031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1225653123495 and 1225653123504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225653123143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52893546 + ... + 52916712.

It is an arithmetic number, because the mean of its divisors is an integer number (54594279936).

Almost surely, 2^{1225653123543} is an apocalyptic number.

1225653123543 is a deficient number, since it is larger than the sum of its proper divisors (521363834409).

1225653123543 is a wasteful number, since it uses less digits than its factorization.

1225653123543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41935.

The product of its digits is 648000, while the sum is 42.

Adding to 1225653123543 its reverse (3453213565221), we get a palindrome (4678866688764).

The spelling of 1225653123543 in words is "one trillion, two hundred twenty-five billion, six hundred fifty-three million, one hundred twenty-three thousand, five hundred forty-three".