847992140557 has 16 divisors (see below), whose sum is σ = 909465283584. Its totient is φ = 787870720000.

The previous prime is 847992140539. The next prime is 847992140587. The reversal of 847992140557 is 755041299748.

It is a cyclic number.

It is not a de Polignac number, because 847992140557 - 2³⁵ = 813632402189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 847992140495 and 847992140504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847992140587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571444 + ... + 1422157.

It is an arithmetic number, because the mean of its divisors is an integer number (56841580224).

Almost surely, 2^847992140557 is an apocalyptic number.

It is an amenable number.

847992140557 is a deficient number, since it is larger than the sum of its proper divisors (61473143027).

847992140557 is a wasteful number, since it uses less digits than its factorization.

847992140557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993940.

The product of its (nonzero) digits is 25401600, while the sum is 61.

The spelling of 847992140557 in words is "eight hundred forty-seven billion, nine hundred ninety-two million, one hundred forty thousand, five hundred fifty-seven".