620658010547621 has 2 divisors, whose sum is σ = 620658010547622. Its totient is φ = 620658010547620.

The previous prime is 620658010547609. The next prime is 620658010547737. The reversal of 620658010547621 is 126745010856026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325017978345025 + 295640032202596 = 18028255^2 + 17194186^2 .

It is a cyclic number.

It is not a de Polignac number, because 620658010547621 - 2⁶ = 620658010547557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620658010547821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310329005273810 + 310329005273811.

It is an arithmetic number, because the mean of its divisors is an integer number (310329005273811).

Almost surely, 2^{620658010547621} is an apocalyptic number.

It is an amenable number.

620658010547621 is a deficient number, since it is larger than the sum of its proper divisors (1).

620658010547621 is an equidigital number, since it uses as much as digits as its factorization.

620658010547621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 620658010547621 in words is "six hundred twenty trillion, six hundred fifty-eight billion, ten million, five hundred forty-seven thousand, six hundred twenty-one".