78534138435202 has 8 divisors (see below), whose sum is σ = 117807153364476. Its totient is φ = 39265087313712.

The previous prime is 78534138435107. The next prime is 78534138435209. The reversal of 78534138435202 is 20253483143587.

It can be written as a sum of positive squares in 2 ways, for example, as 74503845296721 + 4030293138481 = 8631561^2 + 2007559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78534138435202² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78534138435209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990902413 + ... + 990981664.

Almost surely, 2^{78534138435202} is an apocalyptic number.

78534138435202 is a deficient number, since it is larger than the sum of its proper divisors (39273014929274).

78534138435202 is a wasteful number, since it uses less digits than its factorization.

78534138435202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981903892.

The product of its (nonzero) digits is 19353600, while the sum is 55.

The spelling of 78534138435202 in words is "seventy-eight trillion, five hundred thirty-four billion, one hundred thirty-eight million, four hundred thirty-five thousand, two hundred two".