2638466136 has 80 divisors (see below), whose sum is σ = 7399711440. Its totient is φ = 878351040.

The previous prime is 2638466101. The next prime is 2638466161. The reversal of 2638466136 is 6316648362.

2638466136 is a `hidden beast` number, since 2 + 638 + 4 + 6 + 6 + 1 + 3 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2638466091 and 2638466100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 607605 + ... + 611931.

It is an arithmetic number, because the mean of its divisors is an integer number (92496393).

Almost surely, 2^2638466136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2638466136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3699855720).

2638466136 is an abundant number, since it is smaller than the sum of its proper divisors (4761245304).

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

2638466136 is a wasteful number, since it uses less digits than its factorization.

2638466136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286 (or 5273 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 2638466136 is about 51366.0017521317. The cubic root of 2638466136 is about 1381.8169262318.

The spelling of 2638466136 in words is "two billion, six hundred thirty-eight million, four hundred sixty-six thousand, one hundred thirty-six".