2543401605 has 16 divisors (see below), whose sum is σ = 4071242880. Its totient is φ = 1355880768.

The previous prime is 2543401591. The next prime is 2543401631. The reversal of 2543401605 is 5061043452.

2543401605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2543401605 - 2⁴ = 2543401589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1345 + ... + 71334.

It is an arithmetic number, because the mean of its divisors is an integer number (254452680).

Almost surely, 2^2543401605 is an apocalyptic number.

It is an amenable number.

2543401605 is a deficient number, since it is larger than the sum of its proper divisors (1527841275).

2543401605 is a wasteful number, since it uses less digits than its factorization.

2543401605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75020.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 2543401605 is about 50432.1485265103. The cubic root of 2543401605 is about 1365.0177968671.

The spelling of 2543401605 in words is "two billion, five hundred forty-three million, four hundred one thousand, six hundred five".