223638223640 has 32 divisors (see below), whose sum is σ = 541892620080. Its totient is φ = 82574113152.

The previous prime is 223638223639. The next prime is 223638223651. The reversal of 223638223640 is 46322836322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215036234 + ... + 215037273.

Almost surely, 2^223638223640 is an apocalyptic number.

223638223640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223638223640 is an abundant number, since it is smaller than the sum of its proper divisors (318254396440).

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

223638223640 is a wasteful number, since it uses less digits than its factorization.

223638223640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430073531 (or 430073527 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 223638223640 in words is "two hundred twenty-three billion, six hundred thirty-eight million, two hundred twenty-three thousand, six hundred forty".