29975643138 has 16 divisors (see below), whose sum is σ = 68515755840. Its totient is φ = 8564469456.

The previous prime is 29975643121. The next prime is 29975643149. The reversal of 29975643138 is 83134657992.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356852853 + ... + 356852936.

It is an arithmetic number, because the mean of its divisors is an integer number (4282234740).

Almost surely, 2^29975643138 is an apocalyptic number.

29975643138 is an abundant number, since it is smaller than the sum of its proper divisors (38540112702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29975643138 is a wasteful number, since it uses less digits than its factorization.

29975643138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713705801.

The product of its digits is 9797760, while the sum is 57.

The spelling of 29975643138 in words is "twenty-nine billion, nine hundred seventy-five million, six hundred forty-three thousand, one hundred thirty-eight".