12155066578 has 8 divisors (see below), whose sum is σ = 18243077580. Its totient is φ = 6074040720.

The previous prime is 12155066569. The next prime is 12155066621. The reversal of 12155066578 is 87566055121.

It can be written as a sum of positive squares in 2 ways, for example, as 7048106209 + 5106960369 = 83953^2 + 71463^2 .

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

It is a super-2 number, since 2×12155066578² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741933 + ... + 1748896.

Almost surely, 2^12155066578 is an apocalyptic number.

12155066578 is a deficient number, since it is larger than the sum of its proper divisors (6088011002).

12155066578 is a wasteful number, since it uses less digits than its factorization.

12155066578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492572.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 12155066578 in words is "twelve billion, one hundred fifty-five million, sixty-six thousand, five hundred seventy-eight".