512210897978 has 8 divisors (see below), whose sum is σ = 827417604468. Its totient is φ = 236405029824.

The previous prime is 512210897969. The next prime is 512210897993. The reversal of 512210897978 is 879798012215.

It can be written as a sum of positive squares in 2 ways, for example, as 501925490089 + 10285407889 = 708467^2 + 101417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 9850209551 + ... + 9850209602.

Almost surely, 2^512210897978 is an apocalyptic number.

512210897978 is a deficient number, since it is larger than the sum of its proper divisors (315206706490).

512210897978 is a wasteful number, since it uses less digits than its factorization.

512210897978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19700419168.

The product of its (nonzero) digits is 5080320, while the sum is 59.

The spelling of 512210897978 in words is "five hundred twelve billion, two hundred ten million, eight hundred ninety-seven thousand, nine hundred seventy-eight".