25503005305553 has 4 divisors (see below), whose sum is σ = 25623872629488. Its totient is φ = 25382137981620.

The previous prime is 25503005305549. The next prime is 25503005305573. The reversal of 25503005305553 is 35550350030552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25503005305553 - 2² = 25503005305549 is a prime.

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 25503005305553.

It is not an unprimeable number, because it can be changed into a prime (25503005305573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60433661651 + ... + 60433662072.

It is an arithmetic number, because the mean of its divisors is an integer number (6405968157372).

Almost surely, 2^{25503005305553} is an apocalyptic number.

It is an amenable number.

25503005305553 is a deficient number, since it is larger than the sum of its proper divisors (120867323935).

25503005305553 is a wasteful number, since it uses less digits than its factorization.

25503005305553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120867323934.

The product of its (nonzero) digits is 843750, while the sum is 41.

The spelling of 25503005305553 in words is "twenty-five trillion, five hundred three billion, five million, three hundred five thousand, five hundred fifty-three".