620044422642461 has 2 divisors, whose sum is σ = 620044422642462. Its totient is φ = 620044422642460.

The previous prime is 620044422642431. The next prime is 620044422642467. The reversal of 620044422642461 is 164246224440026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601116093193561 + 18928329448900 = 24517669^2 + 4350670^2 .

It is a cyclic number.

It is not a de Polignac number, because 620044422642461 - 2⁶ = 620044422642397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620044422642467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310022211321230 + 310022211321231.

It is an arithmetic number, because the mean of its divisors is an integer number (310022211321231).

Almost surely, 2^{620044422642461} is an apocalyptic number.

It is an amenable number.

620044422642461 is a deficient number, since it is larger than the sum of its proper divisors (1).

620044422642461 is an equidigital number, since it uses as much as digits as its factorization.

620044422642461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3538944, while the sum is 47.

The spelling of 620044422642461 in words is "six hundred twenty trillion, forty-four billion, four hundred twenty-two million, six hundred forty-two thousand, four hundred sixty-one".