70991972611 has 4 divisors (see below), whose sum is σ = 81133682992. Its totient is φ = 60850262232.

The previous prime is 70991972599. The next prime is 70991972617. The reversal of 70991972611 is 11627919907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11627919907 = 881 ⋅13198547.

It is a cyclic number.

It is not a de Polignac number, because 70991972611 - 2⁹ = 70991972099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70991972617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5070855180 + ... + 5070855193.

It is an arithmetic number, because the mean of its divisors is an integer number (20283420748).

Almost surely, 2^70991972611 is an apocalyptic number.

70991972611 is a deficient number, since it is larger than the sum of its proper divisors (10141710381).

70991972611 is a wasteful number, since it uses less digits than its factorization.

70991972611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141710380.

The product of its (nonzero) digits is 428652, while the sum is 52.

The spelling of 70991972611 in words is "seventy billion, nine hundred ninety-one million, nine hundred seventy-two thousand, six hundred eleven".