25191812000513 has 4 divisors (see below), whose sum is σ = 25191845531568. Its totient is φ = 25191778469460.

The previous prime is 25191812000507. The next prime is 25191812000549. The reversal of 25191812000513 is 31500021819152.

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 25191812000513 - 2²⁴ = 25191795223297 is a prime.

It is a super-2 number, since 2×25191812000513² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25191812000213) 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, 15612131 + ... + 17149992.

It is an arithmetic number, because the mean of its divisors is an integer number (6297961382892).

Almost surely, 2^{25191812000513} is an apocalyptic number.

It is an amenable number.

25191812000513 is a deficient number, since it is larger than the sum of its proper divisors (33531055).

25191812000513 is an equidigital number, since it uses as much as digits as its factorization.

25191812000513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33531054.

The product of its (nonzero) digits is 21600, while the sum is 38.

Adding to 25191812000513 its reverse (31500021819152), we get a palindrome (56691833819665).

The spelling of 25191812000513 in words is "twenty-five trillion, one hundred ninety-one billion, eight hundred twelve million, five hundred thirteen", and thus it is an aban number.