78104158100 has 18 divisors (see below), whose sum is σ = 169486023294. Its totient is φ = 31241663200.

The previous prime is 78104158079. The next prime is 78104158109. The reversal of 78104158100 is 185140187.

It can be written as a sum of positive squares in 3 ways, for example, as 144817156 + 77959340944 = 12034^2 + 279212^2 .

It is a super-2 number, since 2×78104158100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78104158109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390520691 + ... + 390520890.

It is an arithmetic number, because the mean of its divisors is an integer number (9415890183).

Almost surely, 2^78104158100 is an apocalyptic number.

It is an amenable number.

78104158100 is an abundant number, since it is smaller than the sum of its proper divisors (91381865194).

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

78104158100 is a wasteful number, since it uses less digits than its factorization.

78104158100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781041595 (or 781041588 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 35.

Adding to 78104158100 its reverse (185140187), we get a palindrome (78289298287).

The spelling of 78104158100 in words is "seventy-eight billion, one hundred four million, one hundred fifty-eight thousand, one hundred".