2638811016 has 96 divisors (see below), whose sum is σ = 7390955520. Its totient is φ = 849657600.

The previous prime is 2638810981. The next prime is 2638811023. The reversal of 2638811016 is 6101188362.

2638811016 is a `hidden beast` number, since 2 + 638 + 8 + 1 + 1 + 0 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2211316 + ... + 2212508.

It is an arithmetic number, because the mean of its divisors is an integer number (76989120).

Almost surely, 2^2638811016 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 2638811016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3695477760).

2638811016 is an abundant number, since it is smaller than the sum of its proper divisors (4752144504).

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

2638811016 is a wasteful number, since it uses less digits than its factorization.

2638811016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2638811016 is about 51369.3587267741. The cubic root of 2638811016 is about 1381.8771304356.

Adding to 2638811016 its reverse (6101188362), we get a palindrome (8739999378).

The spelling of 2638811016 in words is "two billion, six hundred thirty-eight million, eight hundred eleven thousand, sixteen".