25826739849 has 9 divisors (see below), whose sum is σ = 37305987303. Its totient is φ = 17217505152.

The previous prime is 25826739817. The next prime is 25826739863. The reversal of 25826739849 is 94893762852.

The square root of 25826739849 is 160707.

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

25826739849 is a `hidden beast` number, since 2 + 582 + 6 + 7 + 3 + 9 + 8 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2637541449 + 23189198400 = 51357^2 + 152280^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 25826739849 - 2⁵ = 25826739817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25826739899) 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, 455337 + ... + 508905.

Almost surely, 2^25826739849 is an apocalyptic number.

25826739849 is the 160707-th square number.

25826739849 is the 80354-th centered octagonal number.

It is an amenable number.

25826739849 is a deficient number, since it is larger than the sum of its proper divisors (11479247454).

25826739849 is an frugal number, since it uses more digits than its factorization.

25826739849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107144 (or 53572 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

It can be divided in two parts, 258267 and 39849, that added together give a square (298116 = 546²).

The spelling of 25826739849 in words is "twenty-five billion, eight hundred twenty-six million, seven hundred thirty-nine thousand, eight hundred forty-nine".