25481449071 has 20 divisors (see below), whose sum is σ = 40992950152. Its totient is φ = 15680891088.

The previous prime is 25481449069. The next prime is 25481449109. The reversal of 25481449071 is 17094418452.

25481449071 is a `hidden beast` number, since 2 + 548 + 14 + 4 + 90 + 7 + 1 = 666.

It is not a de Polignac number, because 25481449071 - 2¹ = 25481449069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481449571) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12098401 + ... + 12100506.

Almost surely, 2^25481449071 is an apocalyptic number.

25481449071 is a deficient number, since it is larger than the sum of its proper divisors (15511501081).

25481449071 is a wasteful number, since it uses less digits than its factorization.

25481449071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24198932 (or 24198923 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

It can be divided in two parts, 25481 and 449071, that added together give a cube (474552 = 78³).

The spelling of 25481449071 in words is "twenty-five billion, four hundred eighty-one million, four hundred forty-nine thousand, seventy-one".