78126552218 has 32 divisors (see below), whose sum is σ = 142425077760. Its totient is φ = 31650010560.

The previous prime is 78126552199. The next prime is 78126552241. The reversal of 78126552218 is 81225562187.

It is a super-2 number, since 2×78126552218² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4701530 + ... + 4718117.

It is an arithmetic number, because the mean of its divisors is an integer number (4450783680).

Almost surely, 2^78126552218 is an apocalyptic number.

78126552218 is a deficient number, since it is larger than the sum of its proper divisors (64298525542).

78126552218 is a wasteful number, since it uses less digits than its factorization.

78126552218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419702.

The product of its digits is 537600, while the sum is 47.

The spelling of 78126552218 in words is "seventy-eight billion, one hundred twenty-six million, five hundred fifty-two thousand, two hundred eighteen".