6399785480 has 32 divisors (see below), whose sum is σ = 15708565440. Its totient is φ = 2327194560.

The previous prime is 6399785471. The next prime is 6399785521. The reversal of 6399785480 is 845879936.

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, 7272044 + ... + 7272923.

It is an arithmetic number, because the mean of its divisors is an integer number (490892670).

Almost surely, 2^6399785480 is an apocalyptic number.

It is an amenable number.

6399785480 is an abundant number, since it is smaller than the sum of its proper divisors (9308779960).

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

6399785480 is a wasteful number, since it uses less digits than its factorization.

6399785480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14544989 (or 14544985 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 59.

The square root of 6399785480 is about 79998.6592387647. The cubic root of 6399785480 is about 1856.6147891792.

The spelling of 6399785480 in words is "six billion, three hundred ninety-nine million, seven hundred eighty-five thousand, four hundred eighty".