70545649109 has 4 divisors (see below), whose sum is σ = 75972237516. Its totient is φ = 65119060704.

The previous prime is 70545649039. The next prime is 70545649121. The reversal of 70545649109 is 90194654507.

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 25624966084 + 44920683025 = 160078^2 + 211945^2 .

It is a cyclic number.

It is not a de Polignac number, because 70545649109 - 2¹² = 70545645013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70545649159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2713294184 + ... + 2713294209.

It is an arithmetic number, because the mean of its divisors is an integer number (18993059379).

Almost surely, 2^70545649109 is an apocalyptic number.

It is an amenable number.

70545649109 is a deficient number, since it is larger than the sum of its proper divisors (5426588407).

70545649109 is a wasteful number, since it uses less digits than its factorization.

70545649109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426588406.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 70545649109 in words is "seventy billion, five hundred forty-five million, six hundred forty-nine thousand, one hundred nine".