6548942405 has 6 divisors (see below), whose sum is σ = 7858948038. Its totient is φ = 5239009160.

The previous prime is 6548942359. The next prime is 6548942431. The reversal of 6548942405 is 5042498456.

It can be written as a sum of positive squares in only one way, i.e., 5239153924 + 1309788481 = 72382^2 + 36191^2 .

It is not a de Polignac number, because 6548942405 - 2⁸ = 6548942149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6548942405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162860 + ... + 199050.

It is an arithmetic number, because the mean of its divisors is an integer number (1309824673).

Almost surely, 2^6548942405 is an apocalyptic number.

It is an amenable number.

6548942405 is a deficient number, since it is larger than the sum of its proper divisors (1310005633).

6548942405 is an frugal number, since it uses more digits than its factorization.

6548942405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72387 (or 36196 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 47.

The square root of 6548942405 is about 80925.5361736949. The cubic root of 6548942405 is about 1870.9279241374.

The spelling of 6548942405 in words is "six billion, five hundred forty-eight million, nine hundred forty-two thousand, four hundred five".