13506553725 has 48 divisors (see below), whose sum is σ = 25601778048. Its totient is φ = 6154871040.

The previous prime is 13506553717. The next prime is 13506553747. The reversal of 13506553725 is 52735560531.

It is a happy number.

It is not a de Polignac number, because 13506553725 - 2³ = 13506553717 is a prime.

It is a super-2 number, since 2×13506553725² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 125847 + ... + 207003.

It is an arithmetic number, because the mean of its divisors is an integer number (533370376).

Almost surely, 2^13506553725 is an apocalyptic number.

13506553725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13506553725 is a deficient number, since it is larger than the sum of its proper divisors (12095224323).

13506553725 is a wasteful number, since it uses less digits than its factorization.

13506553725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81494 (or 81489 counting only the distinct ones).

The product of its (nonzero) digits is 472500, while the sum is 42.

The spelling of 13506553725 in words is "thirteen billion, five hundred six million, five hundred fifty-three thousand, seven hundred twenty-five".