3655223898840 has 384 divisors, whose sum is σ = 12974159419200. Its totient is φ = 915177553920.

The previous prime is 3655223898829. The next prime is 3655223898841. The reversal of 3655223898840 is 488983225563.

3655223898840 is a `hidden beast` number, since 3 + 6 + 552 + 2 + 38 + 9 + 8 + 8 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655223898841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 131388612 + ... + 131416428.

Almost surely, 2^{3655223898840} is an apocalyptic number.

3655223898840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3655223898840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6487079709600).

3655223898840 is an abundant number, since it is smaller than the sum of its proper divisors (9318935520360).

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

3655223898840 is a wasteful number, since it uses less digits than its factorization.

3655223898840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28292 (or 28265 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 3655223898840 in words is "three trillion, six hundred fifty-five billion, two hundred twenty-three million, eight hundred ninety-eight thousand, eight hundred forty".