1218226677 has 8 divisors (see below), whose sum is σ = 1654949664. Its totient is φ = 796827408.

The previous prime is 1218226673. The next prime is 1218226697. The reversal of 1218226677 is 7766228121.

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

It is not a de Polignac number, because 1218226677 - 2² = 1218226673 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218226673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3830743 + ... + 3831060.

It is an arithmetic number, because the mean of its divisors is an integer number (206868708).

Almost surely, 2^1218226677 is an apocalyptic number.

It is an amenable number.

1218226677 is a deficient number, since it is larger than the sum of its proper divisors (436722987).

1218226677 is an equidigital number, since it uses as much as digits as its factorization.

1218226677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7661859.

The product of its digits is 112896, while the sum is 42.

The square root of 1218226677 is about 34903.1041169693. The cubic root of 1218226677 is about 1068.0117609767.

The spelling of 1218226677 in words is "one billion, two hundred eighteen million, two hundred twenty-six thousand, six hundred seventy-seven".