512689455842 has 4 divisors (see below), whose sum is σ = 769034183766. Its totient is φ = 256344727920.

The previous prime is 512689455799. The next prime is 512689455847. The reversal of 512689455842 is 248554986215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 470446463881 + 42242991961 = 685891^2 + 205531^2 .

It is not an unprimeable number, because it can be changed into a prime (512689455847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128172363959 + ... + 128172363962.

Almost surely, 2^512689455842 is an apocalyptic number.

512689455842 is a deficient number, since it is larger than the sum of its proper divisors (256344727924).

512689455842 is a wasteful number, since it uses less digits than its factorization.

512689455842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256344727923.

The product of its digits is 27648000, while the sum is 59.

The spelling of 512689455842 in words is "five hundred twelve billion, six hundred eighty-nine million, four hundred fifty-five thousand, eight hundred forty-two".