25556847057 has 32 divisors (see below), whose sum is σ = 43285544960. Its totient is φ = 14598954000.

The previous prime is 25556847013. The next prime is 25556847059. The reversal of 25556847057 is 75074865552.

25556847057 is a `hidden beast` number, since 2 + 5 + 5 + 568 + 4 + 70 + 5 + 7 = 666.

It is not a de Polignac number, because 25556847057 - 2⁸ = 25556846801 is a prime.

It is a super-2 number, since 2×25556847057² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25556846994 and 25556847012.

It is not an unprimeable number, because it can be changed into a prime (25556847059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576432 + ... + 619182.

It is an arithmetic number, because the mean of its divisors is an integer number (1352673280).

Almost surely, 2^25556847057 is an apocalyptic number.

25556847057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25556847057 is a deficient number, since it is larger than the sum of its proper divisors (17728697903).

25556847057 is a wasteful number, since it uses less digits than its factorization.

25556847057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45930 (or 45924 counting only the distinct ones).

The product of its (nonzero) digits is 11760000, while the sum is 54.

The spelling of 25556847057 in words is "twenty-five billion, five hundred fifty-six million, eight hundred forty-seven thousand, fifty-seven".