25430153809 has 4 divisors (see below), whose sum is σ = 25441493616. Its totient is φ = 25418814004.

The previous prime is 25430153807. The next prime is 25430153821. The reversal of 25430153809 is 90835103452.

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 25430153809 - 2¹ = 25430153807 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25430153807) 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, 5666539 + ... + 5671024.

It is an arithmetic number, because the mean of its divisors is an integer number (6360373404).

Almost surely, 2^25430153809 is an apocalyptic number.

It is an amenable number.

25430153809 is a deficient number, since it is larger than the sum of its proper divisors (11339807).

25430153809 is a wasteful number, since it uses less digits than its factorization.

25430153809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11339806.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 25430153809 in words is "twenty-five billion, four hundred thirty million, one hundred fifty-three thousand, eight hundred nine".