6545981706 has 32 divisors (see below), whose sum is σ = 14391184896. Its totient is φ = 1968486000.

The previous prime is 6545981681. The next prime is 6545981747. The reversal of 6545981706 is 6071895456.

It is a super-4 number, since 4×6545981706⁴ (a number of 40 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369910 + ... + 387201.

It is an arithmetic number, because the mean of its divisors is an integer number (449724528).

Almost surely, 2^6545981706 is an apocalyptic number.

6545981706 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6545981706 is an abundant number, since it is smaller than the sum of its proper divisors (7845203190).

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

6545981706 is a wasteful number, since it uses less digits than its factorization.

6545981706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757258.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The square root of 6545981706 is about 80907.2413693608. The cubic root of 6545981706 is about 1870.6459402157.

The spelling of 6545981706 in words is "six billion, five hundred forty-five million, nine hundred eighty-one thousand, seven hundred six".