628343347081 has 2 divisors, whose sum is σ = 628343347082. Its totient is φ = 628343347080.

The previous prime is 628343346973. The next prime is 628343347117. The reversal of 628343347081 is 180743343826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362505143056 + 265838204025 = 602084^2 + 515595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628343347081 is a prime.

It is a super-2 number, since 2×628343347081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628343347981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314171673540 + 314171673541.

It is an arithmetic number, because the mean of its divisors is an integer number (314171673541).

Almost surely, 2^628343347081 is an apocalyptic number.

It is an amenable number.

628343347081 is a deficient number, since it is larger than the sum of its proper divisors (1).

628343347081 is an equidigital number, since it uses as much as digits as its factorization.

628343347081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 628343347081 in words is "six hundred twenty-eight billion, three hundred forty-three million, three hundred forty-seven thousand, eighty-one".