6415155646 has 16 divisors (see below), whose sum is σ = 9803903760. Its totient is φ = 3147439680.

The previous prime is 6415155641. The next prime is 6415155647. The reversal of 6415155646 is 6465515146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6415155641) 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, 11631 + ... + 113866.

It is an arithmetic number, because the mean of its divisors is an integer number (612743985).

Almost surely, 2^6415155646 is an apocalyptic number.

6415155646 is a deficient number, since it is larger than the sum of its proper divisors (3388748114).

6415155646 is a wasteful number, since it uses less digits than its factorization.

6415155646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125979.

The product of its digits is 432000, while the sum is 43.

The square root of 6415155646 is about 80094.6667762592. Note that the first 3 decimals coincide. The cubic root of 6415155646 is about 1858.0999255676.

The spelling of 6415155646 in words is "six billion, four hundred fifteen million, one hundred fifty-five thousand, six hundred forty-six".