25481036506 has 8 divisors (see below), whose sum is σ = 38615591700. Its totient is φ = 12609172608.

The previous prime is 25481036419. The next prime is 25481036513. The reversal of 25481036506 is 60563018452.

It can be written as a sum of positive squares in 2 ways, for example, as 22896229225 + 2584807281 = 151315^2 + 50841^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65672581 + ... + 65672968.

Almost surely, 2^25481036506 is an apocalyptic number.

25481036506 is a deficient number, since it is larger than the sum of its proper divisors (13134555194).

25481036506 is a wasteful number, since it uses less digits than its factorization.

25481036506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131345648.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 25481036506 in words is "twenty-five billion, four hundred eighty-one million, thirty-six thousand, five hundred six".