25613543523513 has 16 divisors (see below), whose sum is σ = 37445180389056. Its totient is φ = 15444560927040.

The previous prime is 25613543523511. The next prime is 25613543523551. The reversal of 25613543523513 is 31532534531652.

It is not a de Polignac number, because 25613543523513 - 2¹ = 25613543523511 is a prime.

It is a super-2 number, since 2×25613543523513² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25613543523511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969963006 + ... + 1969976007.

It is an arithmetic number, because the mean of its divisors is an integer number (2340323774316).

Almost surely, 2^{25613543523513} is an apocalyptic number.

It is an amenable number.

25613543523513 is a deficient number, since it is larger than the sum of its proper divisors (11831636865543).

25613543523513 is a wasteful number, since it uses less digits than its factorization.

25613543523513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939939224.

The product of its digits is 4860000, while the sum is 48.

The spelling of 25613543523513 in words is "twenty-five trillion, six hundred thirteen billion, five hundred forty-three million, five hundred twenty-three thousand, five hundred thirteen".