487834170781 has 4 divisors (see below), whose sum is σ = 516530298492. Its totient is φ = 459138043072.

The previous prime is 487834170779. The next prime is 487834170793. The reversal of 487834170781 is 187071438784.

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 396321870681 + 91512300100 = 629541^2 + 302510^2 .

It is a cyclic number.

It is not a de Polignac number, because 487834170781 - 2¹ = 487834170779 is a prime.

It is a super-2 number, since 2×487834170781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487834170721) 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, 14348063830 + ... + 14348063863.

It is an arithmetic number, because the mean of its divisors is an integer number (129132574623).

Almost surely, 2^487834170781 is an apocalyptic number.

It is an amenable number.

487834170781 is a deficient number, since it is larger than the sum of its proper divisors (28696127711).

487834170781 is a wasteful number, since it uses less digits than its factorization.

487834170781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28696127710.

The product of its (nonzero) digits is 8429568, while the sum is 58.

The spelling of 487834170781 in words is "four hundred eighty-seven billion, eight hundred thirty-four million, one hundred seventy thousand, seven hundred eighty-one".