25405352122 has 8 divisors (see below), whose sum is σ = 38155844916. Its totient is φ = 12686737152.

The previous prime is 25405352113. The next prime is 25405352153. The reversal of 25405352122 is 22125350452.

It can be written as a sum of positive squares in 2 ways, for example, as 21868790161 + 3536561961 = 147881^2 + 59469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7967463 + ... + 7970650.

Almost surely, 2^25405352122 is an apocalyptic number.

25405352122 is a deficient number, since it is larger than the sum of its proper divisors (12750492794).

25405352122 is a wasteful number, since it uses less digits than its factorization.

25405352122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15938912.

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 25405352122 in words is "twenty-five billion, four hundred five million, three hundred fifty-two thousand, one hundred twenty-two".