6545087021 has 8 divisors (see below), whose sum is σ = 7165874784. Its totient is φ = 5928595920.

The previous prime is 6545087011. The next prime is 6545087027. The reversal of 6545087021 is 1207805456.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6545087021 is a prime.

It is a super-2 number, since 2×6545087021² = 85676328224925308882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545087027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070975 + ... + 1077068.

It is an arithmetic number, because the mean of its divisors is an integer number (895734348).

Almost surely, 2^6545087021 is an apocalyptic number.

It is an amenable number.

6545087021 is a deficient number, since it is larger than the sum of its proper divisors (620787763).

6545087021 is a wasteful number, since it uses less digits than its factorization.

6545087021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148331.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 6545087021 is about 80901.7121017843. The cubic root of 6545087021 is about 1870.5607115878.

The spelling of 6545087021 in words is "six billion, five hundred forty-five million, eighty-seven thousand, twenty-one".