25358804478 has 144 divisors (see below), whose sum is σ = 66326957424. Its totient is φ = 6976005120.

The previous prime is 25358804453. The next prime is 25358804509. The reversal of 25358804478 is 87440885352.

25358804478 is a `hidden beast` number, since 2 + 53 + 588 + 0 + 4 + 4 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3161493 + ... + 3169503.

It is an arithmetic number, because the mean of its divisors is an integer number (460603871).

Almost surely, 2^25358804478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25358804478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33163478712).

25358804478 is an abundant number, since it is smaller than the sum of its proper divisors (40968152946).

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

25358804478 is a wasteful number, since it uses less digits than its factorization.

25358804478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8167 (or 8157 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 25358804478 in words is "twenty-five billion, three hundred fifty-eight million, eight hundred four thousand, four hundred seventy-eight".