13404235425 has 72 divisors (see below), whose sum is σ = 27136879200. Its totient is φ = 5805112320.

The previous prime is 13404235409. The next prime is 13404235441. The reversal of 13404235425 is 52453240431.

It is an interprime number because it is at equal distance from previous prime (13404235409) and next prime (13404235441).

It is not a de Polignac number, because 13404235425 - 2⁴ = 13404235409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26160 + ... + 165809.

It is an arithmetic number, because the mean of its divisors is an integer number (376901100).

Almost surely, 2^13404235425 is an apocalyptic number.

13404235425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13404235425 is an abundant number, since it is smaller than the sum of its proper divisors (13732643775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13404235425 is a wasteful number, since it uses less digits than its factorization.

13404235425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192015 (or 192003 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 13404235425 its reverse (52453240431), we get a palindrome (65857475856).

The spelling of 13404235425 in words is "thirteen billion, four hundred four million, two hundred thirty-five thousand, four hundred twenty-five".