26406864615121 has 9 divisors (see below), whose sum is σ = 26430261545961. Its totient is φ = 26383488391332.

The previous prime is 26406864615073. The next prime is 26406864615143. The reversal of 26406864615121 is 12151646860462.

The square root of 26406864615121 is 5138761.

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

It is not a de Polignac number, because 26406864615121 - 2⁷ = 26406864614993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26406864615151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10704037930 + ... + 10704040396.

It is an arithmetic number, because the mean of its divisors is an integer number (2936695727329).

Almost surely, 2^{26406864615121} is an apocalyptic number.

26406864615121 is the 5138761-st square number.

26406864615121 is the 2569381-st centered octagonal number.

It is an amenable number.

26406864615121 is a deficient number, since it is larger than the sum of its proper divisors (23396930840).

26406864615121 is an frugal number, since it uses more digits than its factorization.

26406864615121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 26406864615121 in words is "twenty-six trillion, four hundred six billion, eight hundred sixty-four million, six hundred fifteen thousand, one hundred twenty-one".