6542404992 has 160 divisors (see below), whose sum is σ = 19542322800. Its totient is φ = 2172718080.

The previous prime is 6542404991. The next prime is 6542405003. The reversal of 6542404992 is 2994042456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542404991) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3223434 + ... + 3225462.

Almost surely, 2^6542404992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6542404992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9771161400).

6542404992 is an abundant number, since it is smaller than the sum of its proper divisors (12999917808).

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

6542404992 is a wasteful number, since it uses less digits than its factorization.

6542404992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6542404992 is about 80885.1345551208. The cubic root of 6542404992 is about 1870.3051721536.

The spelling of 6542404992 in words is "six billion, five hundred forty-two million, four hundred four thousand, nine hundred ninety-two".