26724257541601 has 3 divisors (see below), whose sum is σ = 26724262711153. Its totient is φ = 26724252372050.

The previous prime is 26724257541521. The next prime is 26724257541719. The reversal of 26724257541601 is 10614575242762.

The square root of 26724257541601 is 5169551.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 26724257541601 - 2⁹ = 26724257541089 is a prime.

It is a super-2 number, since 2×26724257541601² (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 (26724257521601) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2584776 + ... + 7754326.

Almost surely, 2^{26724257541601} is an apocalyptic number.

26724257541601 is the 5169551-st square number.

26724257541601 is the 2584776-th centered octagonal number.

It is an amenable number.

26724257541601 is a deficient number, since it is larger than the sum of its proper divisors (5169552).

26724257541601 is an frugal number, since it uses more digits than its factorization.

26724257541601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339102 (or 5169551 counting only the distinct ones).

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

The spelling of 26724257541601 in words is "twenty-six trillion, seven hundred twenty-four billion, two hundred fifty-seven million, five hundred forty-one thousand, six hundred one".