512994302640 has 120 divisors (see below), whose sum is σ = 1725824422608. Its totient is φ = 136558794240.

The previous prime is 512994302629. The next prime is 512994302663. The reversal of 512994302640 is 46203499215.

512994302640 is a `hidden beast` number, since 51 + 299 + 4 + 302 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 212779 + ... + 1035018.

Almost surely, 2^512994302640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 512994302640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862912211304).

512994302640 is an abundant number, since it is smaller than the sum of its proper divisors (1212830119968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512994302640 is a wasteful number, since it uses less digits than its factorization.

512994302640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248387 (or 1248378 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 512994302640 in words is "five hundred twelve billion, nine hundred ninety-four million, three hundred two thousand, six hundred forty".