18240655144464 has 45 divisors (see below), whose sum is σ = 51048643592973. Its totient is φ = 6080201297856.

The previous prime is 18240655144429. The next prime is 18240655144483. The reversal of 18240655144464 is 46444155604281.

The square root of 18240655144464 is 4270908.

It is a perfect power (a square), and thus also a powerful number.

18240655144464 is a `hidden beast` number, since 1 + 8 + 2 + 4 + 0 + 6 + 551 + 44 + 46 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2746669806864 + 15493985337600 = 1657308^2 + 3936240^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18240655144464.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51072942 + ... + 51428850.

Almost surely, 2^{18240655144464} is an apocalyptic number.

18240655144464 is the 4270908-th square number.

It is an amenable number.

18240655144464 is an abundant number, since it is smaller than the sum of its proper divisors (32807988448509).

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

18240655144464 is an frugal number, since it uses more digits than its factorization.

18240655144464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711832 (or 355914 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 54.

The spelling of 18240655144464 in words is "eighteen trillion, two hundred forty billion, six hundred fifty-five million, one hundred forty-four thousand, four hundred sixty-four".