2638536466 has 8 divisors (see below), whose sum is σ = 3958672140. Its totient is φ = 1318979088.

The previous prime is 2638536443. The next prime is 2638536473. The reversal of 2638536466 is 6646358362.

2638536466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2565929025 + 72607441 = 50655^2 + 8521^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132981 + ... + 151528.

Almost surely, 2^2638536466 is an apocalyptic number.

2638536466 is a deficient number, since it is larger than the sum of its proper divisors (1320135674).

2638536466 is a wasteful number, since it uses less digits than its factorization.

2638536466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289148.

The product of its digits is 3732480, while the sum is 49.

The square root of 2638536466 is about 51366.6863443614. The cubic root of 2638536466 is about 1381.8292038602.

The spelling of 2638536466 in words is "two billion, six hundred thirty-eight million, five hundred thirty-six thousand, four hundred sixty-six".