6545449157 has 24 divisors (see below), whose sum is σ = 7600033056. Its totient is φ = 5601454848.

The previous prime is 6545449111. The next prime is 6545449159. The reversal of 6545449157 is 7519445456.

It is not a de Polignac number, because 6545449157 - 2¹² = 6545445061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545449159) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 238718 + ... + 264720.

It is an arithmetic number, because the mean of its divisors is an integer number (316668044).

Almost surely, 2^6545449157 is an apocalyptic number.

6545449157 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

6545449157 is a deficient number, since it is larger than the sum of its proper divisors (1054583899).

6545449157 is a wasteful number, since it uses less digits than its factorization.

6545449157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26117 (or 26100 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 50.

The square root of 6545449157 is about 80903.9501940418. The cubic root of 6545449157 is about 1870.5952099771.

The spelling of 6545449157 in words is "six billion, five hundred forty-five million, four hundred forty-nine thousand, one hundred fifty-seven".