6540894372 has 12 divisors (see below), whose sum is σ = 15262086896. Its totient is φ = 2180298120.

The previous prime is 6540894361. The next prime is 6540894379. The reversal of 6540894372 is 2734980456.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×6540894372² = 85566598371322548768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6540894379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272537254 + ... + 272537277.

Almost surely, 2^6540894372 is an apocalyptic number.

It is an amenable number.

6540894372 is an abundant number, since it is smaller than the sum of its proper divisors (8721192524).

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

6540894372 is a wasteful number, since it uses less digits than its factorization.

6540894372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545074538 (or 545074536 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The square root of 6540894372 is about 80875.7959589889. The cubic root of 6540894372 is about 1870.1612119492.

The spelling of 6540894372 in words is "six billion, five hundred forty million, eight hundred ninety-four thousand, three hundred seventy-two".