512490736609 has 4 divisors (see below), whose sum is σ = 517564902420. Its totient is φ = 507416570800.

The previous prime is 512490736607. The next prime is 512490736621. The reversal of 512490736609 is 906637094215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906637094215 = 5 ⋅181327418843.

It can be written as a sum of positive squares in 2 ways, for example, as 503674090000 + 8816646609 = 709700^2 + 93897^2 .

It is a cyclic number.

It is not a de Polignac number, because 512490736609 - 2¹ = 512490736607 is a prime.

It is a super-2 number, since 2×512490736609² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512490736601) 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, 2537082754 + ... + 2537082955.

It is an arithmetic number, because the mean of its divisors is an integer number (129391225605).

Almost surely, 2^512490736609 is an apocalyptic number.

It is an amenable number.

512490736609 is a deficient number, since it is larger than the sum of its proper divisors (5074165811).

512490736609 is a wasteful number, since it uses less digits than its factorization.

512490736609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074165810.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 512490736609 in words is "five hundred twelve billion, four hundred ninety million, seven hundred thirty-six thousand, six hundred nine".