6623161440 has 288 divisors, whose sum is σ = 24365940480. Its totient is φ = 1507838976.

The previous prime is 6623161421. The next prime is 6623161451. The reversal of 6623161440 is 441613266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8913709 + ... + 8914451.

It is an arithmetic number, because the mean of its divisors is an integer number (84603960).

Almost surely, 2^6623161440 is an apocalyptic number.

6623161440 is a gapful number since it is divisible by the number (60) 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 6623161440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12182970240).

6623161440 is an abundant number, since it is smaller than the sum of its proper divisors (17742779040).

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

6623161440 is a wasteful number, since it uses less digits than its factorization.

6623161440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6623161440 is about 81382.8080125035. The cubic root of 6623161440 is about 1877.9691212439.

The spelling of 6623161440 in words is "six billion, six hundred twenty-three million, one hundred sixty-one thousand, four hundred forty".