26244217113921 has 81 divisors (see below), whose sum is σ = 39078806612547. Its totient is φ = 16971999226560.

The previous prime is 26244217113887. The next prime is 26244217113923. The reversal of 26244217113921 is 12931171244262.

The square root of 26244217113921 is 5122911.

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

26244217113921 is a `hidden beast` number, since 2 + 6 + 2 + 4 + 421 + 71 + 139 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17735561472321 + 8508655641600 = 4211361^2 + 2916960^2 .

It is not a de Polignac number, because 26244217113921 - 2⁹ = 26244217113409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26244217113923) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 93395790301 + ... + 93395790581.

Almost surely, 2^{26244217113921} is an apocalyptic number.

26244217113921 is the 5122911-st square number.

26244217113921 is the 2561456-th centered octagonal number.

It is an amenable number.

26244217113921 is a deficient number, since it is larger than the sum of its proper divisors (12834589498626).

26244217113921 is an frugal number, since it uses more digits than its factorization.

26244217113921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 446 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 26244217113921 in words is "twenty-six trillion, two hundred forty-four billion, two hundred seventeen million, one hundred thirteen thousand, nine hundred twenty-one".