25578285557 has 8 divisors (see below), whose sum is σ = 27904785120. Its totient is φ = 23251986160.

The previous prime is 25578285541. The next prime is 25578285559. The reversal of 25578285557 is 75558287552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25578285557 - 2⁴ = 25578285541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25578285496 and 25578285505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25578285559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371819 + ... + 435207.

It is an arithmetic number, because the mean of its divisors is an integer number (3488098140).

Almost surely, 2^25578285557 is an apocalyptic number.

It is an amenable number.

25578285557 is a deficient number, since it is larger than the sum of its proper divisors (2326499563).

25578285557 is a wasteful number, since it uses less digits than its factorization.

25578285557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100083.

The product of its digits is 39200000, while the sum is 59.

The spelling of 25578285557 in words is "twenty-five billion, five hundred seventy-eight million, two hundred eighty-five thousand, five hundred fifty-seven".