70905948185 has 4 divisors (see below), whose sum is σ = 85087137828. Its totient is φ = 56724758544.

The previous prime is 70905948143. The next prime is 70905948251. The reversal of 70905948185 is 58184950907.

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 23554882576 + 47351065609 = 153476^2 + 217603^2 .

It is a cyclic number.

It is not a de Polignac number, because 70905948185 - 2¹⁴ = 70905931801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70905948185.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7090594814 + ... + 7090594823.

It is an arithmetic number, because the mean of its divisors is an integer number (21271784457).

Almost surely, 2^70905948185 is an apocalyptic number.

It is an amenable number.

70905948185 is a deficient number, since it is larger than the sum of its proper divisors (14181189643).

70905948185 is a wasteful number, since it uses less digits than its factorization.

70905948185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14181189642.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 70905948185 in words is "seventy billion, nine hundred five million, nine hundred forty-eight thousand, one hundred eighty-five".