671782508741 has 4 divisors (see below), whose sum is σ = 673685575692. Its totient is φ = 669879441792.

The previous prime is 671782508729. The next prime is 671782508759. The reversal of 671782508741 is 147805287176.

671782508741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 484506484225 + 187276024516 = 696065^2 + 432754^2 .

It is a cyclic number.

It is not a de Polignac number, because 671782508741 - 2¹⁴ = 671782492357 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 (671782508701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951532946 + ... + 951533651.

It is an arithmetic number, because the mean of its divisors is an integer number (168421393923).

Almost surely, 2^671782508741 is an apocalyptic number.

It is an amenable number.

671782508741 is a deficient number, since it is larger than the sum of its proper divisors (1903066951).

671782508741 is a wasteful number, since it uses less digits than its factorization.

671782508741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903066950.

The product of its (nonzero) digits is 5268480, while the sum is 56.

The spelling of 671782508741 in words is "six hundred seventy-one billion, seven hundred eighty-two million, five hundred eight thousand, seven hundred forty-one".