2438664861 has 16 divisors (see below), whose sum is σ = 3443572224. Its totient is φ = 1531877424.

The previous prime is 2438664853. The next prime is 2438664863. The reversal of 2438664861 is 1684668342.

It is not a de Polignac number, because 2438664861 - 2³ = 2438664853 is a prime.

It is a super-2 number, since 2×2438664861² = 11894172608552298642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2438664861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2438664863) 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, 259131 + ... + 268376.

It is an arithmetic number, because the mean of its divisors is an integer number (215223264).

Almost surely, 2^2438664861 is an apocalyptic number.

It is an amenable number.

2438664861 is a deficient number, since it is larger than the sum of its proper divisors (1004907363).

2438664861 is a wasteful number, since it uses less digits than its factorization.

2438664861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527600.

The product of its digits is 1327104, while the sum is 48.

The square root of 2438664861 is about 49382.8397421614. The cubic root of 2438664861 is about 1346.0175015957.

The spelling of 2438664861 in words is "two billion, four hundred thirty-eight million, six hundred sixty-four thousand, eight hundred sixty-one".