1218476765 has 16 divisors (see below), whose sum is σ = 1597397760. Its totient is φ = 884886720.

The previous prime is 1218476729. The next prime is 1218476851. The reversal of 1218476765 is 5676748121.

It is not a de Polignac number, because 1218476765 - 2¹⁴ = 1218460381 is a prime.

It is a congruent 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, 23372 + ... + 54618.

It is an arithmetic number, because the mean of its divisors is an integer number (99837360).

Almost surely, 2^1218476765 is an apocalyptic number.

It is an amenable number.

1218476765 is a deficient number, since it is larger than the sum of its proper divisors (378920995).

1218476765 is a wasteful number, since it uses less digits than its factorization.

1218476765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31972.

The product of its digits is 564480, while the sum is 47.

The square root of 1218476765 is about 34906.6865371092. The cubic root of 1218476765 is about 1068.0848395083.

The spelling of 1218476765 in words is "one billion, two hundred eighteen million, four hundred seventy-six thousand, seven hundred sixty-five".