5247691334657 has 4 divisors (see below), whose sum is σ = 5375683806276. Its totient is φ = 5119698863040.

The previous prime is 5247691334629. The next prime is 5247691334659. The reversal of 5247691334657 is 7564331967425.

It is a happy number.

It is a Cunningham number, because it is equal to 2290784²+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 252864156736 + 4994827177921 = 502856^2 + 2234911^2 .

It is a cyclic number.

It is not a de Polignac number, because 5247691334657 - 2²⁶ = 5247624225793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5247691334657.

It is not an unprimeable number, because it can be changed into a prime (5247691334659) 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 3 ways as a sum of consecutive naturals, for example, 63996235748 + ... + 63996235829.

It is an arithmetic number, because the mean of its divisors is an integer number (1343920951569).

Almost surely, 2^{5247691334657} is an apocalyptic number.

It is an amenable number.

5247691334657 is a deficient number, since it is larger than the sum of its proper divisors (127992471619).

5247691334657 is a wasteful number, since it uses less digits than its factorization.

5247691334657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127992471618.

The product of its digits is 114307200, while the sum is 62.

The spelling of 5247691334657 in words is "five trillion, two hundred forty-seven billion, six hundred ninety-one million, three hundred thirty-four thousand, six hundred fifty-seven".