26518494025 has 9 divisors (see below), whose sum is σ = 32883942261. Its totient is φ = 21214143840.

The previous prime is 26518493929. The next prime is 26518494029. The reversal of 26518494025 is 52049481562.

The square root of 26518494025 is 162845.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6079788729 + 20438705296 = 77973^2 + 142964^2 .

It is not a de Polignac number, because 26518494025 - 2⁹ = 26518493513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26518494029) 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, 797941 + ... + 830509.

Almost surely, 2^26518494025 is an apocalyptic number.

26518494025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26518494025 is the 162845-th square number.

26518494025 is the 81423-rd centered octagonal number.

It is an amenable number.

26518494025 is a deficient number, since it is larger than the sum of its proper divisors (6365448236).

26518494025 is an frugal number, since it uses more digits than its factorization.

26518494025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65148 (or 32574 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 26518494025 in words is "twenty-six billion, five hundred eighteen million, four hundred ninety-four thousand, twenty-five".