1225653123544 has 16 divisors (see below), whose sum is σ = 2298135663720. Its totient is φ = 612816946560.

The previous prime is 1225653123517. The next prime is 1225653123557. The reversal of 1225653123544 is 4453213565221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225653123544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644974 + ... + 1693309.

Almost surely, 2^{1225653123544} is an apocalyptic number.

It is an amenable number.

1225653123544 is a deficient number, since it is larger than the sum of its proper divisors (1072482540176).

1225653123544 is a wasteful number, since it uses less digits than its factorization.

1225653123544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403810 (or 2403806 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

Adding to 1225653123544 its reverse (4453213565221), we get a palindrome (5678866688765).

The spelling of 1225653123544 in words is "one trillion, two hundred twenty-five billion, six hundred fifty-three million, one hundred twenty-three thousand, five hundred forty-four".