8581057957 has 4 divisors (see below), whose sum is σ = 8638649100. Its totient is φ = 8523466816.

The previous prime is 8581057817. The next prime is 8581057963. The reversal of 8581057957 is 7597501858.

It is a happy number.

It is a Cunningham number, because it is equal to 92634²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1005270436 + 7575787521 = 31706^2 + 87039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8581057957 is a prime.

It is a super-2 number, since 2×8581057957² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8581057898 and 8581057907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8581057997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28795348 + ... + 28795645.

It is an arithmetic number, because the mean of its divisors is an integer number (2159662275).

Almost surely, 2^8581057957 is an apocalyptic number.

It is an amenable number.

8581057957 is a deficient number, since it is larger than the sum of its proper divisors (57591143).

8581057957 is a wasteful number, since it uses less digits than its factorization.

8581057957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57591142.

The product of its (nonzero) digits is 3528000, while the sum is 55.

The square root of 8581057957 is about 92634.0000053976. Note that the first 5 decimals coincide. The cubic root of 8581057957 is about 2047.2943052934.

The spelling of 8581057957 in words is "eight billion, five hundred eighty-one million, fifty-seven thousand, nine hundred fifty-seven".