70878993923 has 4 divisors (see below), whose sum is σ = 70896289800. Its totient is φ = 70861698048.

The previous prime is 70878993851. The next prime is 70878993937. The reversal of 70878993923 is 32939987807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32939987807 = 109 ⋅302201723.

It is a cyclic number.

It is not a de Polignac number, because 70878993923 - 2¹² = 70878989827 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 70878993923.

It is not an unprimeable number, because it can be changed into a prime (70878993953) 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, 8641790 + ... + 8649987.

It is an arithmetic number, because the mean of its divisors is an integer number (17724072450).

Almost surely, 2^70878993923 is an apocalyptic number.

70878993923 is a deficient number, since it is larger than the sum of its proper divisors (17295877).

70878993923 is a wasteful number, since it uses less digits than its factorization.

70878993923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17295876.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The spelling of 70878993923 in words is "seventy billion, eight hundred seventy-eight million, nine hundred ninety-three thousand, nine hundred twenty-three".