2427687820638 has 24 divisors (see below), whose sum is σ = 5371904966688. Its totient is φ = 792011629152.

The previous prime is 2427687820631. The next prime is 2427687820651. The reversal of 2427687820638 is 8360287867242.

2427687820638 is a `hidden beast` number, since 2 + 427 + 68 + 78 + 20 + 63 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2427687820631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1434802831 + ... + 1434804522.

It is an arithmetic number, because the mean of its divisors is an integer number (223829373612).

Almost surely, 2^{2427687820638} is an apocalyptic number.

2427687820638 is an abundant number, since it is smaller than the sum of its proper divisors (2944217146050).

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

2427687820638 is a wasteful number, since it uses less digits than its factorization.

2427687820638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869607408 (or 2869607405 counting only the distinct ones).

The product of its (nonzero) digits is 86704128, while the sum is 63.

The spelling of 2427687820638 in words is "two trillion, four hundred twenty-seven billion, six hundred eighty-seven million, eight hundred twenty thousand, six hundred thirty-eight".