70723514581 has 8 divisors (see below), whose sum is σ = 70920296600. Its totient is φ = 70526827008.

The previous prime is 70723514539. The next prime is 70723514599. The reversal of 70723514581 is 18541532707.

It can be written as a sum of positive squares in 4 ways, for example, as 35664322500 + 35059192081 = 188850^2 + 187241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70723514581 - 2¹¹ = 70723512533 is a prime.

It is a super-2 number, since 2×70723514581² (a number of 23 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 (70723514881) 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 7 ways as a sum of consecutive naturals, for example, 1636945 + ... + 1679593.

It is an arithmetic number, because the mean of its divisors is an integer number (8865037075).

Almost surely, 2^70723514581 is an apocalyptic number.

It is an amenable number.

70723514581 is a deficient number, since it is larger than the sum of its proper divisors (196782019).

70723514581 is a wasteful number, since it uses less digits than its factorization.

70723514581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47223.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 70723514581 in words is "seventy billion, seven hundred twenty-three million, five hundred fourteen thousand, five hundred eighty-one".