6542651642 has 8 divisors (see below), whose sum is σ = 9816384000. Its totient is φ = 3270523644.

The previous prime is 6542651641. The next prime is 6542651677. The reversal of 6542651642 is 2461562456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6542651642.

It is not an unprimeable number, because it can be changed into a prime (6542651641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390842 + ... + 407237.

It is an arithmetic number, because the mean of its divisors is an integer number (1227048000).

Almost surely, 2^6542651642 is an apocalyptic number.

6542651642 is a deficient number, since it is larger than the sum of its proper divisors (3273732358).

6542651642 is a wasteful number, since it uses less digits than its factorization.

6542651642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802180.

The product of its digits is 345600, while the sum is 41.

The square root of 6542651642 is about 80886.6592337698. The cubic root of 6542651642 is about 1870.3286754868.

The spelling of 6542651642 in words is "six billion, five hundred forty-two million, six hundred fifty-one thousand, six hundred forty-two".