2638663941 has 8 divisors (see below), whose sum is σ = 3518665920. Its totient is φ = 1758885632.

The previous prime is 2638663939. The next prime is 2638663943. The reversal of 2638663941 is 1493668362.

It is an interprime number because it is at equal distance from previous prime (2638663939) and next prime (2638663943).

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

It is a cyclic number.

It is not a de Polignac number, because 2638663941 - 2¹ = 2638663939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638663943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26121 + ... + 77198.

It is an arithmetic number, because the mean of its divisors is an integer number (439833240).

Almost surely, 2^2638663941 is an apocalyptic number.

It is an amenable number.

2638663941 is a deficient number, since it is larger than the sum of its proper divisors (880001979).

2638663941 is a wasteful number, since it uses less digits than its factorization.

2638663941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111835.

The product of its digits is 1119744, while the sum is 48.

The square root of 2638663941 is about 51367.9271627735. The cubic root of 2638663941 is about 1381.8514568331.

The spelling of 2638663941 in words is "two billion, six hundred thirty-eight million, six hundred sixty-three thousand, nine hundred forty-one".