70878235161 has 4 divisors (see below), whose sum is σ = 94504313552. Its totient is φ = 47252156772.

The previous prime is 70878235091. The next prime is 70878235199. The reversal of 70878235161 is 16153287807.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16153287807 = 3 ⋅5384429269.

It is a de Polignac number, because none of the positive numbers 2^k-70878235161 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 70878235161.

It is not an unprimeable number, because it can be changed into a prime (70878235061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11813039191 + ... + 11813039196.

It is an arithmetic number, because the mean of its divisors is an integer number (23626078388).

Almost surely, 2^70878235161 is an apocalyptic number.

It is an amenable number.

70878235161 is a deficient number, since it is larger than the sum of its proper divisors (23626078391).

70878235161 is a wasteful number, since it uses less digits than its factorization.

70878235161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23626078390.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 70878235161 in words is "seventy billion, eight hundred seventy-eight million, two hundred thirty-five thousand, one hundred sixty-one".