18146312055840 has 48 divisors (see below), whose sum is σ = 57160882977408. Its totient is φ = 4839016548096.

The previous prime is 18146312055829. The next prime is 18146312055841. The reversal of 18146312055840 is 4855021364181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18146312055840.

It is not an unprimeable number, because it can be changed into a prime (18146312055841) 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, 18902407912 + ... + 18902408871.

It is an arithmetic number, because the mean of its divisors is an integer number (1190851728696).

Almost surely, 2^{18146312055840} is an apocalyptic number.

18146312055840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18146312055840 is an abundant number, since it is smaller than the sum of its proper divisors (39014570921568).

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

18146312055840 is a wasteful number, since it uses less digits than its factorization.

18146312055840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37804816801 (or 37804816793 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 18146312055840 in words is "eighteen trillion, one hundred forty-six billion, three hundred twelve million, fifty-five thousand, eight hundred forty".