512662506421 has 8 divisors (see below), whose sum is σ = 552454527800. Its totient is φ = 472921405632.

The previous prime is 512662506407. The next prime is 512662506451. The reversal of 512662506421 is 124605266215.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 593458321 + 512069048100 = 24361^2 + 715590^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-512662506421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512662506451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12709230 + ... + 12749503.

It is an arithmetic number, because the mean of its divisors is an integer number (69056815975).

Almost surely, 2^512662506421 is an apocalyptic number.

It is an amenable number.

512662506421 is a deficient number, since it is larger than the sum of its proper divisors (39792021379).

512662506421 is a wasteful number, since it uses less digits than its factorization.

512662506421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25460295.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 512662506421 in words is "five hundred twelve billion, six hundred sixty-two million, five hundred six thousand, four hundred twenty-one".