25421455153 has 4 divisors (see below), whose sum is σ = 25446954100. Its totient is φ = 25395956208.

The previous prime is 25421455127. The next prime is 25421455177. The reversal of 25421455153 is 35155412452.

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 11757715489 + 13663739664 = 108433^2 + 116892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25421455153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25421455183) 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, 12747978 + ... + 12749971.

It is an arithmetic number, because the mean of its divisors is an integer number (6361738525).

Almost surely, 2^25421455153 is an apocalyptic number.

It is an amenable number.

25421455153 is a deficient number, since it is larger than the sum of its proper divisors (25498947).

25421455153 is an equidigital number, since it uses as much as digits as its factorization.

25421455153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25498946.

The product of its digits is 120000, while the sum is 37.

The spelling of 25421455153 in words is "twenty-five billion, four hundred twenty-one million, four hundred fifty-five thousand, one hundred fifty-three".