706531272581 has 4 divisors (see below), whose sum is σ = 748091935692. Its totient is φ = 664970609472.

The previous prime is 706531272571. The next prime is 706531272617. The reversal of 706531272581 is 185272135607.

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 611627228356 + 94904044225 = 782066^2 + 308065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-706531272581 is a prime.

It is a super-2 number, since 2×706531272581² (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 (706531272521) 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, 20780331530 + ... + 20780331563.

It is an arithmetic number, because the mean of its divisors is an integer number (187022983923).

Almost surely, 2^706531272581 is an apocalyptic number.

It is an amenable number.

706531272581 is a deficient number, since it is larger than the sum of its proper divisors (41560663111).

706531272581 is a wasteful number, since it uses less digits than its factorization.

706531272581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41560663110.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 706531272581 in words is "seven hundred six billion, five hundred thirty-one million, two hundred seventy-two thousand, five hundred eighty-one".