671052444513521 has 8 divisors (see below), whose sum is σ = 766927390420224. Its totient is φ = 575180076350880.

The previous prime is 671052444513487. The next prime is 671052444513547. The reversal of 671052444513521 is 125315444250176.

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

It is a de Polignac number, because none of the positive numbers 2^k-671052444513521 is a prime.

It is a super-2 number, since 2×671052444513521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671052444513521.

It is not an unprimeable number, because it can be changed into a prime (671052444813521) 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, 643878140 + ... + 644919501.

It is an arithmetic number, because the mean of its divisors is an integer number (95865923802528).

Almost surely, 2^{671052444513521} is an apocalyptic number.

It is an amenable number.

671052444513521 is a deficient number, since it is larger than the sum of its proper divisors (95874945906703).

671052444513521 is a wasteful number, since it uses less digits than its factorization.

671052444513521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288872031.

The product of its (nonzero) digits is 4032000, while the sum is 50.

Adding to 671052444513521 its reverse (125315444250176), we get a palindrome (796367888763697).

The spelling of 671052444513521 in words is "six hundred seventy-one trillion, fifty-two billion, four hundred forty-four million, five hundred thirteen thousand, five hundred twenty-one".