2097577697517 has 20 divisors (see below), whose sum is σ = 3192539646780. Its totient is φ = 1372000503744.

The previous prime is 2097577697513. The next prime is 2097577697531. The reversal of 2097577697517 is 7157967757902.

It can be written as a sum of positive squares in 2 ways, for example, as 533792433321 + 1563785264196 = 730611^2 + 1250514^2 .

It is not a de Polignac number, because 2097577697517 - 2² = 2097577697513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2097577697513) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 244297792 + ... + 244306377.

It is an arithmetic number, because the mean of its divisors is an integer number (159626982339).

Almost surely, 2^{2097577697517} is an apocalyptic number.

2097577697517 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2097577697517 is a deficient number, since it is larger than the sum of its proper divisors (1094961949263).

2097577697517 is an equidigital number, since it uses as much as digits as its factorization.

2097577697517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488604234 (or 488604225 counting only the distinct ones).

The product of its (nonzero) digits is 408410100, while the sum is 72.

The spelling of 2097577697517 in words is "two trillion, ninety-seven billion, five hundred seventy-seven million, six hundred ninety-seven thousand, five hundred seventeen".