70799098561 has 3 divisors (see below), whose sum is σ = 70799364643. Its totient is φ = 70798832480.

The previous prime is 70799098543. The next prime is 70799098577. The reversal of 70799098561 is 16589099707.

The square root of 70799098561 is 266081.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16589099707 = 463 ⋅35829589.

It can be written as a sum of positive squares in only one way, i.e., 6404960961 + 64394137600 = 80031^2 + 253760^2 .

It is not a de Polignac number, because 70799098561 - 2¹⁷ = 70798967489 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 70799098561.

It is not an unprimeable number, because it can be changed into a prime (70799098261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 133041 + ... + 399121.

Almost surely, 2^70799098561 is an apocalyptic number.

70799098561 is the 266081-st square number.

70799098561 is the 133041-st centered octagonal number.

It is an amenable number.

70799098561 is a deficient number, since it is larger than the sum of its proper divisors (266082).

70799098561 is an frugal number, since it uses more digits than its factorization.

70799098561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532162 (or 266081 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 61.

The spelling of 70799098561 in words is "seventy billion, seven hundred ninety-nine million, ninety-eight thousand, five hundred sixty-one".