25864477513 has 8 divisors (see below), whose sum is σ = 29915540928. Its totient is φ = 21902448624.

The previous prime is 25864477493. The next prime is 25864477531. The reversal of 25864477513 is 31577446852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25864477513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25864477553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22258006 + ... + 22259167.

It is an arithmetic number, because the mean of its divisors is an integer number (3739442616).

Almost surely, 2^25864477513 is an apocalyptic number.

It is an amenable number.

25864477513 is a deficient number, since it is larger than the sum of its proper divisors (4051063415).

25864477513 is an equidigital number, since it uses as much as digits as its factorization.

25864477513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44517263.

The product of its digits is 5644800, while the sum is 52.

The spelling of 25864477513 in words is "twenty-five billion, eight hundred sixty-four million, four hundred seventy-seven thousand, five hundred thirteen".