610220211545661 has 16 divisors (see below), whose sum is σ = 814192301344320. Its totient is φ = 406530820200960.

The previous prime is 610220211545627. The next prime is 610220211545663. The reversal of 610220211545661 is 166545112022016.

It is a happy number.

It is not a de Polignac number, because 610220211545661 - 2²³ = 610220203157053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610220211545663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107977261 + ... + 113488013.

It is an arithmetic number, because the mean of its divisors is an integer number (50887018834020).

Almost surely, 2^{610220211545661} is an apocalyptic number.

It is an amenable number.

610220211545661 is a deficient number, since it is larger than the sum of its proper divisors (203972089798659).

610220211545661 is a wasteful number, since it uses less digits than its factorization.

610220211545661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536396.

The product of its (nonzero) digits is 172800, while the sum is 42.

Adding to 610220211545661 its reverse (166545112022016), we get a palindrome (776765323567677).

The spelling of 610220211545661 in words is "six hundred ten trillion, two hundred twenty billion, two hundred eleven million, five hundred forty-five thousand, six hundred sixty-one".