1553403235025 has 24 divisors (see below), whose sum is σ = 1998658696704. Its totient is φ = 1196403379200.

The previous prime is 1553403234967. The next prime is 1553403235039. The reversal of 1553403235025 is 5205323043551.

It is not a de Polignac number, because 1553403235025 - 2²⁶ = 1553336126161 is a prime.

It is a super-2 number, since 2×1553403235025² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1553403235025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5043149 + ... + 5342298.

It is an arithmetic number, because the mean of its divisors is an integer number (83277445696).

Almost surely, 2^{1553403235025} is an apocalyptic number.

It is an amenable number.

1553403235025 is a deficient number, since it is larger than the sum of its proper divisors (445255461679).

1553403235025 is a wasteful number, since it uses less digits than its factorization.

1553403235025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10385681 (or 10385676 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 38.

Adding to 1553403235025 its reverse (5205323043551), we get a palindrome (6758726278576).

The spelling of 1553403235025 in words is "one trillion, five hundred fifty-three billion, four hundred three million, two hundred thirty-five thousand, twenty-five".