25553983653 has 128 divisors (see below), whose sum is σ = 44934912000. Its totient is φ = 14179691520.

The previous prime is 25553983603. The next prime is 25553983657. The reversal of 25553983653 is 35638935552.

25553983653 is a `hidden beast` number, since 2 + 5 + 553 + 9 + 8 + 36 + 53 = 666.

It is not a de Polignac number, because 25553983653 - 2⁶ = 25553983589 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25553983653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25553983657) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32469726 + ... + 32470512.

It is an arithmetic number, because the mean of its divisors is an integer number (351054000).

Almost surely, 2^25553983653 is an apocalyptic number.

It is an amenable number.

25553983653 is a deficient number, since it is larger than the sum of its proper divisors (19380928347).

25553983653 is a wasteful number, since it uses less digits than its factorization.

25553983653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 986 counting only the distinct ones).

The product of its digits is 14580000, while the sum is 54.

The spelling of 25553983653 in words is "twenty-five billion, five hundred fifty-three million, nine hundred eighty-three thousand, six hundred fifty-three".