25513423647 has 32 divisors (see below), whose sum is σ = 36455546880. Its totient is φ = 15833954400.

The previous prime is 25513423643. The next prime is 25513423669. The reversal of 25513423647 is 74632431552.

It is not a de Polignac number, because 25513423647 - 2² = 25513423643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25513423599 and 25513423608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25513423643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558522 + ... + 602472.

It is an arithmetic number, because the mean of its divisors is an integer number (1139235840).

Almost surely, 2^25513423647 is an apocalyptic number.

25513423647 is a deficient number, since it is larger than the sum of its proper divisors (10942123233).

25513423647 is a wasteful number, since it uses less digits than its factorization.

25513423647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44203.

The product of its digits is 604800, while the sum is 42.

The spelling of 25513423647 in words is "twenty-five billion, five hundred thirteen million, four hundred twenty-three thousand, six hundred forty-seven".