70749935581 has 8 divisors (see below), whose sum is σ = 76329036504. Its totient is φ = 65190377280.

The previous prime is 70749935567. The next prime is 70749935593. The reversal of 70749935581 is 18553994707.

It can be written as a sum of positive squares in 4 ways, for example, as 65205625 + 70684729956 = 8075^2 + 265866^2 .

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 70749935581 - 2²⁵ = 70716381149 is a prime.

It is a super-2 number, since 2×70749935581² (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 (70749936581) 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, 4878130 + ... + 4892611.

It is an arithmetic number, because the mean of its divisors is an integer number (9541129563).

Almost surely, 2^70749935581 is an apocalyptic number.

It is an amenable number.

70749935581 is a deficient number, since it is larger than the sum of its proper divisors (5579100923).

70749935581 is a wasteful number, since it uses less digits than its factorization.

70749935581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9771311.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 70749935581 in words is "seventy billion, seven hundred forty-nine million, nine hundred thirty-five thousand, five hundred eighty-one".