47895839657 has 6 divisors (see below), whose sum is σ = 48339294318. Its totient is φ = 47456416512.

The previous prime is 47895839623. The next prime is 47895839669. The reversal of 47895839657 is 75693859874.

It can be written as a sum of positive squares in 3 ways, for example, as 19535932441 + 28359907216 = 139771^2 + 168404^2 .

It is a de Polignac number, because none of the positive numbers 2^k-47895839657 is a prime.

It is a super-2 number, since 2×47895839657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47895899657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2003768 + ... + 2027529.

It is an arithmetic number, because the mean of its divisors is an integer number (8056549053).

Almost surely, 2^47895839657 is an apocalyptic number.

It is an amenable number.

47895839657 is a deficient number, since it is larger than the sum of its proper divisors (443454661).

47895839657 is an equidigital number, since it uses as much as digits as its factorization.

47895839657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031515 (or 4031406 counting only the distinct ones).

The product of its digits is 457228800, while the sum is 71.

The spelling of 47895839657 in words is "forty-seven billion, eight hundred ninety-five million, eight hundred thirty-nine thousand, six hundred fifty-seven".