70889596621 has 4 divisors (see below), whose sum is σ = 73334065500. Its totient is φ = 68445127744.

The previous prime is 70889596597. The next prime is 70889596637. The reversal of 70889596621 is 12669598807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12669598807 = 4013 ⋅3157139.

It can be written as a sum of positive squares in 2 ways, for example, as 22361912521 + 48527684100 = 149539^2 + 220290^2 .

It is a cyclic number.

It is not a de Polignac number, because 70889596621 - 2⁹ = 70889596109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70889596621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70889596651) 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, 1222234396 + ... + 1222234453.

It is an arithmetic number, because the mean of its divisors is an integer number (18333516375).

Almost surely, 2^70889596621 is an apocalyptic number.

It is an amenable number.

70889596621 is a deficient number, since it is larger than the sum of its proper divisors (2444468879).

70889596621 is a wasteful number, since it uses less digits than its factorization.

70889596621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444468878.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 70889596621 in words is "seventy billion, eight hundred eighty-nine million, five hundred ninety-six thousand, six hundred twenty-one".