6545405401 has 4 divisors (see below), whose sum is σ = 6545577472. Its totient is φ = 6545233332.

The previous prime is 6545405381. The next prime is 6545405423. The reversal of 6545405401 is 1045045456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6545405401 - 2¹⁵ = 6545372633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6545405431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885 + ... + 114418.

It is an arithmetic number, because the mean of its divisors is an integer number (1636394368).

Almost surely, 2^6545405401 is an apocalyptic number.

It is an amenable number.

6545405401 is a deficient number, since it is larger than the sum of its proper divisors (172071).

6545405401 is a wasteful number, since it uses less digits than its factorization.

6545405401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172070.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 6545405401 is about 80903.6797741611. The cubic root of 6545405401 is about 1870.5910416894.

The spelling of 6545405401 in words is "six billion, five hundred forty-five million, four hundred five thousand, four hundred one".