512649511897 has 4 divisors (see below), whose sum is σ = 542805365556. Its totient is φ = 482493658240.

The previous prime is 512649511861. The next prime is 512649511909. The reversal of 512649511897 is 798115946215.

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 275846594521 + 236802917376 = 525211^2 + 486624^2 .

It is a cyclic number.

It is not a de Polignac number, because 512649511897 - 2²³ = 512641123289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512649511597) 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, 15077926804 + ... + 15077926837.

It is an arithmetic number, because the mean of its divisors is an integer number (135701341389).

Almost surely, 2^512649511897 is an apocalyptic number.

It is an amenable number.

512649511897 is a deficient number, since it is larger than the sum of its proper divisors (30155853659).

512649511897 is a wasteful number, since it uses less digits than its factorization.

512649511897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30155853658.

The product of its digits is 5443200, while the sum is 58.

The spelling of 512649511897 in words is "five hundred twelve billion, six hundred forty-nine million, five hundred eleven thousand, eight hundred ninety-seven".