510721047661 has 8 divisors (see below), whose sum is σ = 576362311200. Its totient is φ = 448281797040.

The previous prime is 510721047659. The next prime is 510721047671. The reversal of 510721047661 is 166740127015.

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

It is not a de Polignac number, because 510721047661 - 2¹ = 510721047659 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 (510721047671) 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 7 ways as a sum of consecutive naturals, for example, 800502891 + ... + 800503528.

It is an arithmetic number, because the mean of its divisors is an integer number (72045288900).

Almost surely, 2^510721047661 is an apocalyptic number.

It is an amenable number.

510721047661 is a deficient number, since it is larger than the sum of its proper divisors (65641263539).

510721047661 is a wasteful number, since it uses less digits than its factorization.

510721047661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601006459.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 510721047661 in words is "five hundred ten billion, seven hundred twenty-one million, forty-seven thousand, six hundred sixty-one".