70768128721 has 4 divisors (see below), whose sum is σ = 70884716032. Its totient is φ = 70651541412.

The previous prime is 70768128719. The next prime is 70768128727. The reversal of 70768128721 is 12782186707.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70768128721 - 2¹ = 70768128719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70768128727) 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, 58292745 + ... + 58293958.

It is an arithmetic number, because the mean of its divisors is an integer number (17721179008).

Almost surely, 2^70768128721 is an apocalyptic number.

It is an amenable number.

70768128721 is a deficient number, since it is larger than the sum of its proper divisors (116587311).

70768128721 is a wasteful number, since it uses less digits than its factorization.

70768128721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116587310.

The product of its (nonzero) digits is 526848, while the sum is 49.

The spelling of 70768128721 in words is "seventy billion, seven hundred sixty-eight million, one hundred twenty-eight thousand, seven hundred twenty-one".