705540648551 has 4 divisors (see below), whose sum is σ = 709482216600. Its totient is φ = 701599080504.

The previous prime is 705540648523. The next prime is 705540648557. The reversal of 705540648551 is 155846045507.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-705540648551 is a prime.

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 705540648551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705540648557) 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, 1970783756 + ... + 1970784113.

It is an arithmetic number, because the mean of its divisors is an integer number (177370554150).

Almost surely, 2^705540648551 is an apocalyptic number.

705540648551 is a deficient number, since it is larger than the sum of its proper divisors (3941568049).

705540648551 is a wasteful number, since it uses less digits than its factorization.

705540648551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941568048.

The product of its (nonzero) digits is 3360000, while the sum is 50.

The spelling of 705540648551 in words is "seven hundred five billion, five hundred forty million, six hundred forty-eight thousand, five hundred fifty-one".