610922780021 has 2 divisors, whose sum is σ = 610922780022. Its totient is φ = 610922780020.

The previous prime is 610922779991. The next prime is 610922780047. The reversal of 610922780021 is 120087229016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514431783121 + 96490996900 = 717239^2 + 310630^2 .

It is a cyclic number.

It is not a de Polignac number, because 610922780021 - 2¹⁰ = 610922778997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (610922780521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305461390010 + 305461390011.

It is an arithmetic number, because the mean of its divisors is an integer number (305461390011).

Almost surely, 2^610922780021 is an apocalyptic number.

It is an amenable number.

610922780021 is a deficient number, since it is larger than the sum of its proper divisors (1).

610922780021 is an equidigital number, since it uses as much as digits as its factorization.

610922780021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 610922780021 in words is "six hundred ten billion, nine hundred twenty-two million, seven hundred eighty thousand, twenty-one".