18234768643564 has 24 divisors (see below), whose sum is σ = 34861491349776. Its totient is φ = 8276707320000.

The previous prime is 18234768643457. The next prime is 18234768643577. The reversal of 18234768643564 is 46534686743281.

It is a self number, because there is not a number n which added to its sum of digits gives 18234768643564.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295565847 + ... + 295627534.

It is an arithmetic number, because the mean of its divisors is an integer number (1452562139574).

Almost surely, 2^{18234768643564} is an apocalyptic number.

It is an amenable number.

18234768643564 is a deficient number, since it is larger than the sum of its proper divisors (16626722706212).

18234768643564 is a wasteful number, since it uses less digits than its factorization.

18234768643564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591194097 (or 591194095 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 67.

The spelling of 18234768643564 in words is "eighteen trillion, two hundred thirty-four billion, seven hundred sixty-eight million, six hundred forty-three thousand, five hundred sixty-four".