1818723654 has 48 divisors (see below), whose sum is σ = 4334385744. Its totient is φ = 551121120.

The previous prime is 1818723649. The next prime is 1818723667. The reversal of 1818723654 is 4563278181.

It is a super-2 number, since 2×1818723654² = 6615511459238223432, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13999 + ... + 61914.

It is an arithmetic number, because the mean of its divisors is an integer number (90299703).

Almost surely, 2^1818723654 is an apocalyptic number.

1818723654 is an abundant number, since it is smaller than the sum of its proper divisors (2515662090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818723654 is a wasteful number, since it uses less digits than its factorization.

1818723654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75954 (or 75929 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1818723654 is about 42646.4963859870. The cubic root of 1818723654 is about 1220.6436749376.

The spelling of 1818723654 in words is "one billion, eight hundred eighteen million, seven hundred twenty-three thousand, six hundred fifty-four".