25668474390 has 48 divisors (see below), whose sum is σ = 71871731568. Its totient is φ = 6318393408.

The previous prime is 25668474383. The next prime is 25668474413. The reversal of 25668474390 is 9347486652.

25668474390 is a `hidden beast` number, since 2 + 566 + 8 + 4 + 74 + 3 + 9 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10968264 + ... + 10970603.

It is an arithmetic number, because the mean of its divisors is an integer number (1497327741).

Almost surely, 2^25668474390 is an apocalyptic number.

25668474390 is an abundant number, since it is smaller than the sum of its proper divisors (46203257178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25668474390 is a wasteful number, since it uses less digits than its factorization.

25668474390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21938893 (or 21938890 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 25668474390 in words is "twenty-five billion, six hundred sixty-eight million, four hundred seventy-four thousand, three hundred ninety".