6551545401 has 24 divisors (see below), whose sum is σ = 10173371520. Its totient is φ = 4049774496.

The previous prime is 6551545393. The next prime is 6551545417. The reversal of 6551545401 is 1045451556.

6551545401 is a `hidden beast` number, since 6 + 551 + 54 + 54 + 0 + 1 = 666.

It is not a de Polignac number, because 6551545401 - 2³ = 6551545393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6551545471) 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, 399550 + ... + 415623.

It is an arithmetic number, because the mean of its divisors is an integer number (423890480).

Almost surely, 2^6551545401 is an apocalyptic number.

It is an amenable number.

6551545401 is a deficient number, since it is larger than the sum of its proper divisors (3621826119).

6551545401 is a wasteful number, since it uses less digits than its factorization.

6551545401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815245 (or 815242 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 6551545401 is about 80941.6172373644. The cubic root of 6551545401 is about 1871.1757693883.

Adding to 6551545401 its reverse (1045451556), we get a palindrome (7596996957).

The spelling of 6551545401 in words is "six billion, five hundred fifty-one million, five hundred forty-five thousand, four hundred one".