647298097157 has 4 divisors (see below), whose sum is σ = 681366418080. Its totient is φ = 613229776236.

The previous prime is 647298097153. The next prime is 647298097183. The reversal of 647298097157 is 751790892746.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751790892746 = 2 ⋅375895446373.

It is a cyclic number.

It is not a de Polignac number, because 647298097157 - 2² = 647298097153 is a prime.

It is a super-2 number, since 2×647298097157² (a number of 24 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 = 647298097093 and 647298097102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647298097153) 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, 17034160433 + ... + 17034160470.

It is an arithmetic number, because the mean of its divisors is an integer number (170341604520).

Almost surely, 2^647298097157 is an apocalyptic number.

It is an amenable number.

647298097157 is a deficient number, since it is larger than the sum of its proper divisors (34068320923).

647298097157 is a wasteful number, since it uses less digits than its factorization.

647298097157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34068320922.

The product of its (nonzero) digits is 53343360, while the sum is 65.

The spelling of 647298097157 in words is "six hundred forty-seven billion, two hundred ninety-eight million, ninety-seven thousand, one hundred fifty-seven".