63493000240 has 80 divisors (see below), whose sum is σ = 149911735392. Its totient is φ = 25003579392.

The previous prime is 63493000237. The next prime is 63493000247. The reversal of 63493000240 is 4200039436.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×63493000240² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63493000247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17455702 + ... + 17459338.

Almost surely, 2^63493000240 is an apocalyptic number.

63493000240 is the 145480-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63493000240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74955867696).

63493000240 is an abundant number, since it is smaller than the sum of its proper divisors (86418735152).

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

63493000240 is a wasteful number, since it uses less digits than its factorization.

63493000240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6974 (or 6968 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 63493000240 its reverse (4200039436), we get a palindrome (67693039676).

The spelling of 63493000240 in words is "sixty-three billion, four hundred ninety-three million, two hundred forty", and thus it is an aban number.