26405260425 has 18 divisors (see below), whose sum is σ = 47294755742. Its totient is φ = 14082805440.

The previous prime is 26405260369. The next prime is 26405260429. The reversal of 26405260425 is 52406250462.

26405260425 is a `hidden beast` number, since 2 + 6 + 40 + 5 + 2 + 604 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1610361 + 26403650064 = 1269^2 + 162492^2 .

It is not a de Polignac number, because 26405260425 - 2¹⁶ = 26405194889 is a prime.

It is a super-2 number, since 2×26405260425² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26405260425.

It is not an unprimeable number, because it can be changed into a prime (26405260429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 58678132 + ... + 58678581.

Almost surely, 2^26405260425 is an apocalyptic number.

26405260425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26405260425 is a deficient number, since it is larger than the sum of its proper divisors (20889495317).

26405260425 is a wasteful number, since it uses less digits than its factorization.

26405260425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117356729 (or 117356721 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 26405260425 in words is "twenty-six billion, four hundred five million, two hundred sixty thousand, four hundred twenty-five".