6540462578 has 48 divisors (see below), whose sum is σ = 10875141000. Its totient is φ = 2947875840.

The previous prime is 6540462569. The next prime is 6540462601. The reversal of 6540462578 is 8752640456.

It can be written as a sum of positive squares in 12 ways, for example, as 2377245049 + 4163217529 = 48757^2 + 64523^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3071018 + ... + 3073146.

Almost surely, 2^6540462578 is an apocalyptic number.

6540462578 is a deficient number, since it is larger than the sum of its proper divisors (4334678422).

6540462578 is a wasteful number, since it uses less digits than its factorization.

6540462578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367 (or 2354 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The square root of 6540462578 is about 80873.1264265207. The cubic root of 6540462578 is about 1870.1200584456.

The spelling of 6540462578 in words is "six billion, five hundred forty million, four hundred sixty-two thousand, five hundred seventy-eight".