5217816645157 has 4 divisors (see below), whose sum is σ = 5218172024320. Its totient is φ = 5217461265996.

The previous prime is 5217816645127. The next prime is 5217816645161. The reversal of 5217816645157 is 7515466187125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5217816645157 is a prime.

It is a super-2 number, since 2×5217816645157² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5217816645127) 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, 177667557 + ... + 177696922.

It is an arithmetic number, because the mean of its divisors is an integer number (1304543006080).

Almost surely, 2^{5217816645157} is an apocalyptic number.

It is an amenable number.

5217816645157 is a deficient number, since it is larger than the sum of its proper divisors (355379163).

5217816645157 is a wasteful number, since it uses less digits than its factorization.

5217816645157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355379162.

The product of its digits is 14112000, while the sum is 58.

The spelling of 5217816645157 in words is "five trillion, two hundred seventeen billion, eight hundred sixteen million, six hundred forty-five thousand, one hundred fifty-seven".