18041219616 has 96 divisors (see below), whose sum is σ = 54649340928. Its totient is φ = 5104569600.

The previous prime is 18041219579. The next prime is 18041219629. The reversal of 18041219616 is 61691214081.

It is a tau number, because it is divible by the number of its divisors (96).

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, 61110 + ... + 199541.

It is an arithmetic number, because the mean of its divisors is an integer number (569263968).

Almost surely, 2^18041219616 is an apocalyptic number.

18041219616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18041219616 is an abundant number, since it is smaller than the sum of its proper divisors (36608121312).

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

18041219616 is a wasteful number, since it uses less digits than its factorization.

18041219616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260774 (or 260766 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

It can be divided in two parts, 180412 and 19616, that added together give a triangular number (200028 = T₆₃₂).

The spelling of 18041219616 in words is "eighteen billion, forty-one million, two hundred nineteen thousand, six hundred sixteen".