25155621353 has 4 divisors (see below), whose sum is σ = 25386406980. Its totient is φ = 24924835728.

The previous prime is 25155621329. The next prime is 25155621419. The reversal of 25155621353 is 35312655152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11154105769 + 14001515584 = 105613^2 + 118328^2 .

It is a cyclic number.

It is not a de Polignac number, because 25155621353 - 2⁶ = 25155621289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25155621313) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 115392650 + ... + 115392867.

It is an arithmetic number, because the mean of its divisors is an integer number (6346601745).

Almost surely, 2^25155621353 is an apocalyptic number.

It is an amenable number.

25155621353 is a deficient number, since it is larger than the sum of its proper divisors (230785627).

25155621353 is a wasteful number, since it uses less digits than its factorization.

25155621353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230785626.

The product of its digits is 135000, while the sum is 38.

The spelling of 25155621353 in words is "twenty-five billion, one hundred fifty-five million, six hundred twenty-one thousand, three hundred fifty-three".