512499723945 has 128 divisors (see below), whose sum is σ = 953835264000. Its totient is φ = 232227041280.

The previous prime is 512499723943. The next prime is 512499723971. The reversal of 512499723945 is 549327994215.

It is a happy number.

It is not a de Polignac number, because 512499723945 - 2¹ = 512499723943 is a prime.

It is a super-3 number, since 3×512499723945³ (a number of 36 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (512499723943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 317729959 + ... + 317731571.

It is an arithmetic number, because the mean of its divisors is an integer number (7451838000).

Almost surely, 2^512499723945 is an apocalyptic number.

512499723945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

512499723945 is a deficient number, since it is larger than the sum of its proper divisors (441335540055).

512499723945 is a wasteful number, since it uses less digits than its factorization.

512499723945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375.

The product of its digits is 24494400, while the sum is 60.

The spelling of 512499723945 in words is "five hundred twelve billion, four hundred ninety-nine million, seven hundred twenty-three thousand, nine hundred forty-five".