621956570041 has 2 divisors, whose sum is σ = 621956570042. Its totient is φ = 621956570040.

The previous prime is 621956569957. The next prime is 621956570089. The reversal of 621956570041 is 140075659126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528244054416 + 93712515625 = 726804^2 + 306125^2 .

It is a cyclic number.

It is not a de Polignac number, because 621956570041 - 2¹⁵ = 621956537273 is a prime.

It is a super-3 number, since 3×621956570041³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621956569973 and 621956570000.

It is not a weakly prime, because it can be changed into another prime (621956573041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310978285020 + 310978285021.

It is an arithmetic number, because the mean of its divisors is an integer number (310978285021).

Almost surely, 2^621956570041 is an apocalyptic number.

It is an amenable number.

621956570041 is a deficient number, since it is larger than the sum of its proper divisors (1).

621956570041 is an equidigital number, since it uses as much as digits as its factorization.

621956570041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 621956570041 in words is "six hundred twenty-one billion, nine hundred fifty-six million, five hundred seventy thousand, forty-one".