2208621980537 has 4 divisors (see below), whose sum is σ = 2524139406336. Its totient is φ = 1893104554740.

The previous prime is 2208621980471. The next prime is 2208621980581. The reversal of 2208621980537 is 7350891268022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2208621980537 - 2³⁰ = 2207548238713 is a prime.

It is a super-2 number, since 2×2208621980537² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2208621986537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157758712889 + ... + 157758712902.

It is an arithmetic number, because the mean of its divisors is an integer number (631034851584).

Almost surely, 2^{2208621980537} is an apocalyptic number.

It is an amenable number.

2208621980537 is a deficient number, since it is larger than the sum of its proper divisors (315517425799).

2208621980537 is an equidigital number, since it uses as much as digits as its factorization.

2208621980537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315517425798.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 2208621980537 in words is "two trillion, two hundred eight billion, six hundred twenty-one million, nine hundred eighty thousand, five hundred thirty-seven".