521143627645 has 8 divisors (see below), whose sum is σ = 629937115704. Its totient is φ = 413871727104.

The previous prime is 521143627643. The next prime is 521143627649. The reversal of 521143627645 is 546726341125.

It can be written as a sum of positive squares in 4 ways, for example, as 113317063876 + 407826563769 = 336626^2 + 638613^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 521143627645 - 2¹ = 521143627643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521143627595 and 521143627604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521143627643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380396124 + ... + 380397493.

It is an arithmetic number, because the mean of its divisors is an integer number (78742139463).

Almost surely, 2^521143627645 is an apocalyptic number.

It is an amenable number.

521143627645 is a deficient number, since it is larger than the sum of its proper divisors (108793488059).

521143627645 is a wasteful number, since it uses less digits than its factorization.

521143627645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760793759.

The product of its digits is 1209600, while the sum is 46.

The spelling of 521143627645 in words is "five hundred twenty-one billion, one hundred forty-three million, six hundred twenty-seven thousand, six hundred forty-five".