6613478144 has 144 divisors (see below), whose sum is σ = 16955323392. Its totient is φ = 2502365184.

The previous prime is 6613478141. The next prime is 6613478177. The reversal of 6613478144 is 4418743166.

It is a super-2 number, since 2×6613478144² = 87476186322331369472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6613478095 and 6613478104.

It is not an unprimeable number, because it can be changed into a prime (6613478141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529637 + ... + 541979.

Almost surely, 2^6613478144 is an apocalyptic number.

6613478144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6613478144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8477661696).

6613478144 is an abundant number, since it is smaller than the sum of its proper divisors (10341845248).

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

6613478144 is a wasteful number, since it uses less digits than its factorization.

6613478144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402 (or 12388 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 6613478144 is about 81323.2939814909. The cubic root of 6613478144 is about 1877.0534557878.

The spelling of 6613478144 in words is "six billion, six hundred thirteen million, four hundred seventy-eight thousand, one hundred forty-four".