70138620989 has 4 divisors (see below), whose sum is σ = 70139177280. Its totient is φ = 70138064700.

The previous prime is 70138620941. The next prime is 70138621009. The reversal of 70138620989 is 98902683107.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 70138620989 - 2⁸ = 70138620733 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 70138620989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70138620889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11564 + ... + 374714.

It is an arithmetic number, because the mean of its divisors is an integer number (17534794320).

Almost surely, 2^70138620989 is an apocalyptic number.

It is an amenable number.

70138620989 is a deficient number, since it is larger than the sum of its proper divisors (556291).

70138620989 is a wasteful number, since it uses less digits than its factorization.

70138620989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556290.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 70138620989 in words is "seventy billion, one hundred thirty-eight million, six hundred twenty thousand, nine hundred eighty-nine".