18497563508736 has 1920 divisors, whose sum is σ = 66140477849600. Its totient is φ = 5056584744960.

The previous prime is 18497563508731. The next prime is 18497563508761. The reversal of 18497563508736 is 63780536579481.

It is a happy number.

18497563508736 is a `hidden beast` number, since 1 + 8 + 4 + 9 + 7 + 563 + 50 + 8 + 7 + 3 + 6 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18497563508731) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 145650106305 + ... + 145650106431.

Almost surely, 2^{18497563508736} is an apocalyptic number.

18497563508736 is a gapful number since it is divisible by the number (16) 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 18497563508736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33070238924800).

18497563508736 is an abundant number, since it is smaller than the sum of its proper divisors (47642914340864).

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

18497563508736 is a wasteful number, since it uses less digits than its factorization.

18497563508736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 914457600, while the sum is 72.

The spelling of 18497563508736 in words is "eighteen trillion, four hundred ninety-seven billion, five hundred sixty-three million, five hundred eight thousand, seven hundred thirty-six".