6406281819616 has 48 divisors (see below), whose sum is σ = 14415118560864. Its totient is φ = 2745361833984.

The previous prime is 6406281819607. The next prime is 6406281819659. The reversal of 6406281819616 is 6169181826046.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2335396 + ... + 4273948.

It is an arithmetic number, because the mean of its divisors is an integer number (300314970018).

Almost surely, 2^{6406281819616} is an apocalyptic number.

It is an amenable number.

6406281819616 is an abundant number, since it is smaller than the sum of its proper divisors (8008836741248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6406281819616 is a wasteful number, since it uses less digits than its factorization.

6406281819616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953323 (or 1953315 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 6406281819616 in words is "six trillion, four hundred six billion, two hundred eighty-one million, eight hundred nineteen thousand, six hundred sixteen".