628702531217 has 2 divisors, whose sum is σ = 628702531218. Its totient is φ = 628702531216.

The previous prime is 628702531213. The next prime is 628702531243. The reversal of 628702531217 is 712135207826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526385074576 + 102317456641 = 725524^2 + 319871^2 .

It is a cyclic number.

It is not a de Polignac number, because 628702531217 - 2² = 628702531213 is a prime.

It is not a weakly prime, because it can be changed into another prime (628702531213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314351265608 + 314351265609.

It is an arithmetic number, because the mean of its divisors is an integer number (314351265609).

Almost surely, 2^628702531217 is an apocalyptic number.

It is an amenable number.

628702531217 is a deficient number, since it is larger than the sum of its proper divisors (1).

628702531217 is an equidigital number, since it uses as much as digits as its factorization.

628702531217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 628702531217 in words is "six hundred twenty-eight billion, seven hundred two million, five hundred thirty-one thousand, two hundred seventeen".