6538247988840 has 64 divisors (see below), whose sum is σ = 21794159966400. Its totient is φ = 1743532796736.

The previous prime is 6538247988809. The next prime is 6538247988851. The reversal of 6538247988840 is 488897428356.

6538247988840 is a `hidden beast` number, since 6 + 5 + 38 + 2 + 479 + 8 + 88 + 40 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3026965582 + ... + 3026967741.

It is an arithmetic number, because the mean of its divisors is an integer number (340533749475).

Almost surely, 2^{6538247988840} is an apocalyptic number.

6538247988840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6538247988840 is an abundant number, since it is smaller than the sum of its proper divisors (15255911977560).

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

6538247988840 is a wasteful number, since it uses less digits than its factorization.

6538247988840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6053933343 (or 6053933333 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 72.

The spelling of 6538247988840 in words is "six trillion, five hundred thirty-eight billion, two hundred forty-seven million, nine hundred eighty-eight thousand, eight hundred forty".