6540121494 has 16 divisors (see below), whose sum is σ = 14533603440. Its totient is φ = 2180040480.

The previous prime is 6540121463. The next prime is 6540121529. The reversal of 6540121494 is 4941210456.

6540121494 is a `hidden beast` number, since 6 + 5 + 40 + 121 + 494 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60556627 + ... + 60556734.

It is an arithmetic number, because the mean of its divisors is an integer number (908350215).

Almost surely, 2^6540121494 is an apocalyptic number.

6540121494 is an abundant number, since it is smaller than the sum of its proper divisors (7993481946).

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

6540121494 is a wasteful number, since it uses less digits than its factorization.

6540121494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121113372 (or 121113366 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6540121494 is about 80871.0176392013. The cubic root of 6540121494 is about 1870.0875490672.

The spelling of 6540121494 in words is "six billion, five hundred forty million, one hundred twenty-one thousand, four hundred ninety-four".