25781732348811 has 8 divisors (see below), whose sum is σ = 34375690277520. Its totient is φ = 17187797992992.

The previous prime is 25781732348809. The next prime is 25781732348831. The reversal of 25781732348811 is 11884323718752.

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

It is not a de Polignac number, because 25781732348811 - 2¹ = 25781732348809 is a prime.

It is a super-2 number, since 2×25781732348811² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25781732348831) 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, 3160180 + ... + 7845393.

It is an arithmetic number, because the mean of its divisors is an integer number (4296961284690).

Almost surely, 2^{25781732348811} is an apocalyptic number.

25781732348811 is a deficient number, since it is larger than the sum of its proper divisors (8593957928709).

25781732348811 is a wasteful number, since it uses less digits than its factorization.

25781732348811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11786445.

The product of its digits is 18063360, while the sum is 60.

The spelling of 25781732348811 in words is "twenty-five trillion, seven hundred eighty-one billion, seven hundred thirty-two million, three hundred forty-eight thousand, eight hundred eleven".