18069291944640 has 336 divisors, whose sum is σ = 63375675794496. Its totient is φ = 4724444160000.

The previous prime is 18069291944603. The next prime is 18069291944663. The reversal of 18069291944640 is 4644919296081.

18069291944640 is a `hidden beast` number, since 1 + 8 + 0 + 69 + 2 + 91 + 9 + 446 + 40 = 666.

It is a super-2 number, since 2×18069291944640² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29659090 + ... + 30262190.

Almost surely, 2^{18069291944640} is an apocalyptic number.

18069291944640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18069291944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31687837897248).

18069291944640 is an abundant number, since it is smaller than the sum of its proper divisors (45306383849856).

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

18069291944640 is a wasteful number, since it uses less digits than its factorization.

18069291944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603328 (or 603315 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 18069291944640 in words is "eighteen trillion, sixty-nine billion, two hundred ninety-one million, nine hundred forty-four thousand, six hundred forty".