25489904697 has 24 divisors (see below), whose sum is σ = 37737722880. Its totient is φ = 16573667040.

The previous prime is 25489904677. The next prime is 25489904701. The reversal of 25489904697 is 79640998452.

25489904697 is a `hidden beast` number, since 2 + 5 + 4 + 89 + 90 + 469 + 7 = 666.

It is not a de Polignac number, because 25489904697 - 2⁶ = 25489904633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25489904677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121554 + ... + 256427.

It is an arithmetic number, because the mean of its divisors is an integer number (1572405120).

Almost surely, 2^25489904697 is an apocalyptic number.

It is an amenable number.

25489904697 is a deficient number, since it is larger than the sum of its proper divisors (12247818183).

25489904697 is a wasteful number, since it uses less digits than its factorization.

25489904697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378173 (or 378170 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 25489904697 in words is "twenty-five billion, four hundred eighty-nine million, nine hundred four thousand, six hundred ninety-seven".