2116545220637 has 8 divisors (see below), whose sum is σ = 2212102011000. Its totient is φ = 2022493261824.

The previous prime is 2116545220631. The next prime is 2116545220639. The reversal of 2116545220637 is 7360225456112.

It can be written as a sum of positive squares in 4 ways, for example, as 43192893241 + 2073352327396 = 207829^2 + 1439914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2116545220637 - 2⁸ = 2116545220381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116545220631) 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, 376205012 + ... + 376210637.

It is an arithmetic number, because the mean of its divisors is an integer number (276512751375).

Almost surely, 2^{2116545220637} is an apocalyptic number.

It is an amenable number.

2116545220637 is a deficient number, since it is larger than the sum of its proper divisors (95556790363).

2116545220637 is an equidigital number, since it uses as much as digits as its factorization.

2116545220637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752415775.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 2116545220637 in words is "two trillion, one hundred sixteen billion, five hundred forty-five million, two hundred twenty thousand, six hundred thirty-seven".