25345520013 has 32 divisors (see below), whose sum is σ = 38932669440. Its totient is φ = 14515994240.

The previous prime is 25345520009. The next prime is 25345520023. The reversal of 25345520013 is 31002554352.

It is not a de Polignac number, because 25345520013 - 2² = 25345520009 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25345520023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138168 + ... + 264161.

It is an arithmetic number, because the mean of its divisors is an integer number (1216645920).

Almost surely, 2^25345520013 is an apocalyptic number.

25345520013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25345520013 is a deficient number, since it is larger than the sum of its proper divisors (13587149427).

25345520013 is a wasteful number, since it uses less digits than its factorization.

25345520013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402449.

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 25345520013 in words is "twenty-five billion, three hundred forty-five million, five hundred twenty thousand, thirteen".