6415123855 has 20 divisors (see below), whose sum is σ = 8980655832. Its totient is φ = 4398933840.

The previous prime is 6415123853. The next prime is 6415123873. The reversal of 6415123855 is 5583215146.

It is not a de Polignac number, because 6415123855 - 2¹ = 6415123853 is a prime.

It is a super-2 number, since 2×6415123855² = 82307628149980122050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6415123853) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 255181 + ... + 279190.

Almost surely, 2^6415123855 is an apocalyptic number.

6415123855 is a deficient number, since it is larger than the sum of its proper divisors (2565531977).

6415123855 is an frugal number, since it uses more digits than its factorization.

6415123855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534404 (or 534383 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

The square root of 6415123855 is about 80094.4683171066. The cubic root of 6415123855 is about 1858.0968562240.

The spelling of 6415123855 in words is "six billion, four hundred fifteen million, one hundred twenty-three thousand, eight hundred fifty-five".