2208621980538 has 32 divisors (see below), whose sum is σ = 4908132691200. Its totient is φ = 736194750048.

The previous prime is 2208621980471. The next prime is 2208621980581. The reversal of 2208621980538 is 8350891268022.

It is a happy number.

2208621980538 is a `hidden beast` number, since 2 + 2 + 0 + 8 + 6 + 21 + 9 + 80 + 538 = 666.

It is a super-2 number, since 2×2208621980538² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3165295 + ... + 3799517.

It is an arithmetic number, because the mean of its divisors is an integer number (153379146600).

Almost surely, 2^{2208621980538} is an apocalyptic number.

2208621980538 is an abundant number, since it is smaller than the sum of its proper divisors (2699510710662).

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

2208621980538 is a wasteful number, since it uses less digits than its factorization.

2208621980538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698723 (or 698717 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 2208621980538 in words is "two trillion, two hundred eight billion, six hundred twenty-one million, nine hundred eighty thousand, five hundred thirty-eight".