78111561230 has 32 divisors (see below), whose sum is σ = 144143677440. Its totient is φ = 30458522880.

The previous prime is 78111561221. The next prime is 78111561233. The reversal of 78111561230 is 3216511187.

It is a super-2 number, since 2×78111561230² (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 (78111561233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449912 + ... + 598868.

It is an arithmetic number, because the mean of its divisors is an integer number (4504489920).

Almost surely, 2^78111561230 is an apocalyptic number.

78111561230 is a deficient number, since it is larger than the sum of its proper divisors (66032116210).

78111561230 is a wasteful number, since it uses less digits than its factorization.

78111561230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150284.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 78111561230 in words is "seventy-eight billion, one hundred eleven million, five hundred sixty-one thousand, two hundred thirty".