70716571521 has 8 divisors (see below), whose sum is σ = 94313261664. Its totient is φ = 47132131200.

The previous prime is 70716571517. The next prime is 70716571531. The reversal of 70716571521 is 12517561707.

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

It is not a de Polignac number, because 70716571521 - 2² = 70716571517 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (70716571531) 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 7 ways as a sum of consecutive naturals, for example, 3048976 + ... + 3072081.

It is an arithmetic number, because the mean of its divisors is an integer number (11789157708).

Almost surely, 2^70716571521 is an apocalyptic number.

It is an amenable number.

70716571521 is a deficient number, since it is larger than the sum of its proper divisors (23596690143).

70716571521 is a wasteful number, since it uses less digits than its factorization.

70716571521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124911.

The product of its (nonzero) digits is 102900, while the sum is 42.

The spelling of 70716571521 in words is "seventy billion, seven hundred sixteen million, five hundred seventy-one thousand, five hundred twenty-one".