2181588010638 has 16 divisors (see below), whose sum is σ = 4363300197840. Its totient is φ = 727175307456.

The previous prime is 2181588010633. The next prime is 2181588010709. The reversal of 2181588010638 is 8360108851812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181588010633) 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, 4944853 + ... + 5367936.

It is an arithmetic number, because the mean of its divisors is an integer number (272706262365).

Almost surely, 2^{2181588010638} is an apocalyptic number.

2181588010638 is an abundant number, since it is smaller than the sum of its proper divisors (2181712187202).

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

2181588010638 is a wasteful number, since it uses less digits than its factorization.

2181588010638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348051.

The product of its (nonzero) digits is 737280, while the sum is 51.

The spelling of 2181588010638 in words is "two trillion, one hundred eighty-one billion, five hundred eighty-eight million, ten thousand, six hundred thirty-eight".