6400618355 has 4 divisors (see below), whose sum is σ = 7680742032. Its totient is φ = 5120494680.

The previous prime is 6400618291. The next prime is 6400618361. The reversal of 6400618355 is 5538160046.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6400618355 - 2⁶ = 6400618291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640061831 + ... + 640061840.

It is an arithmetic number, because the mean of its divisors is an integer number (1920185508).

Almost surely, 2^6400618355 is an apocalyptic number.

6400618355 is a deficient number, since it is larger than the sum of its proper divisors (1280123677).

6400618355 is a wasteful number, since it uses less digits than its factorization.

6400618355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280123676.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 6400618355 is about 80003.8646254042. The cubic root of 6400618355 is about 1856.6953263041.

The spelling of 6400618355 in words is "six billion, four hundred million, six hundred eighteen thousand, three hundred fifty-five".