621628932361 has 2 divisors, whose sum is σ = 621628932362. Its totient is φ = 621628932360.

The previous prime is 621628932343. The next prime is 621628932403. The reversal of 621628932361 is 163239826126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337960846336 + 283668086025 = 581344^2 + 532605^2 .

It is a cyclic number.

It is not a de Polignac number, because 621628932361 - 2¹¹ = 621628930313 is a prime.

It is not a weakly prime, because it can be changed into another prime (621628932961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310814466180 + 310814466181.

It is an arithmetic number, because the mean of its divisors is an integer number (310814466181).

Almost surely, 2^621628932361 is an apocalyptic number.

It is an amenable number.

621628932361 is a deficient number, since it is larger than the sum of its proper divisors (1).

621628932361 is an equidigital number, since it uses as much as digits as its factorization.

621628932361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The spelling of 621628932361 in words is "six hundred twenty-one billion, six hundred twenty-eight million, nine hundred thirty-two thousand, three hundred sixty-one".