511811780018 has 32 divisors (see below), whose sum is σ = 958442941440. Its totient is φ = 199138761360.

The previous prime is 511811780017. The next prime is 511811780021. The reversal of 511811780018 is 810087118115.

It is not an unprimeable number, because it can be changed into a prime (511811780017) 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, 2122088 + ... + 2350931.

It is an arithmetic number, because the mean of its divisors is an integer number (29951341920).

Almost surely, 2^511811780018 is an apocalyptic number.

511811780018 is a deficient number, since it is larger than the sum of its proper divisors (446631161422).

511811780018 is a wasteful number, since it uses less digits than its factorization.

511811780018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473782.

The product of its (nonzero) digits is 17920, while the sum is 41.

The spelling of 511811780018 in words is "five hundred eleven billion, eight hundred eleven million, seven hundred eighty thousand, eighteen".