78752954138 has 16 divisors (see below), whose sum is σ = 125169393960. Its totient is φ = 37033199616.

The previous prime is 78752954131. The next prime is 78752954141. The reversal of 78752954138 is 83145925787.

It can be written as a sum of positive squares in 4 ways, for example, as 78062683609 + 690270529 = 279397^2 + 26273^2 .

It is not an unprimeable number, because it can be changed into a prime (78752954131) 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 7 ways as a sum of consecutive naturals, for example, 796823 + ... + 890186.

Almost surely, 2^78752954138 is an apocalyptic number.

78752954138 is a deficient number, since it is larger than the sum of its proper divisors (46416439822).

78752954138 is a wasteful number, since it uses less digits than its factorization.

78752954138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688401.

The product of its digits is 16934400, while the sum is 59.

The spelling of 78752954138 in words is "seventy-eight billion, seven hundred fifty-two million, nine hundred fifty-four thousand, one hundred thirty-eight".