70784477138 has 4 divisors (see below), whose sum is σ = 106176715710. Its totient is φ = 35392238568.

The previous prime is 70784477123. The next prime is 70784477167. The reversal of 70784477138 is 83177448707.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69383247649 + 1401229489 = 263407^2 + 37433^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17696119283 + ... + 17696119286.

Almost surely, 2^70784477138 is an apocalyptic number.

70784477138 is a deficient number, since it is larger than the sum of its proper divisors (35392238572).

70784477138 is a wasteful number, since it uses less digits than its factorization.

70784477138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35392238571.

The product of its (nonzero) digits is 7375872, while the sum is 56.

The spelling of 70784477138 in words is "seventy billion, seven hundred eighty-four million, four hundred seventy-seven thousand, one hundred thirty-eight".