6381305506 has 16 divisors (see below), whose sum is σ = 9675470016. Its totient is φ = 3156328656.

The previous prime is 6381305471. The next prime is 6381305509. The reversal of 6381305506 is 6055031836.

It is not an unprimeable number, because it can be changed into a prime (6381305509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26515 + ... + 116041.

It is an arithmetic number, because the mean of its divisors is an integer number (604716876).

Almost surely, 2^6381305506 is an apocalyptic number.

6381305506 is a deficient number, since it is larger than the sum of its proper divisors (3294164510).

6381305506 is a wasteful number, since it uses less digits than its factorization.

6381305506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89913.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 6381305506 is about 79883.0739643887. The cubic root of 6381305506 is about 1854.8260172044.

The spelling of 6381305506 in words is "six billion, three hundred eighty-one million, three hundred five thousand, five hundred six".