25858220008 has 8 divisors (see below), whose sum is σ = 48484162530. Its totient is φ = 12929110000.

The previous prime is 25858219997. The next prime is 25858220021. The reversal of 25858220008 is 80002285852.

It can be written as a sum of positive squares in only one way, i.e., 17134286404 + 8723933604 = 130898^2 + 93402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1616138743 + ... + 1616138758.

Almost surely, 2^25858220008 is an apocalyptic number.

It is an amenable number.

25858220008 is a deficient number, since it is larger than the sum of its proper divisors (22625942522).

25858220008 is a wasteful number, since it uses less digits than its factorization.

25858220008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232277507 (or 3232277503 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 40.

The spelling of 25858220008 in words is "twenty-five billion, eight hundred fifty-eight million, two hundred twenty thousand, eight".