628247187881 has 2 divisors, whose sum is σ = 628247187882. Its totient is φ = 628247187880.

The previous prime is 628247187823. The next prime is 628247187983. The reversal of 628247187881 is 188781742826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622134450025 + 6112737856 = 788755^2 + 78184^2 .

It is a cyclic number.

It is not a de Polignac number, because 628247187881 - 2⁶ = 628247187817 is a prime.

It is a super-2 number, since 2×628247187881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628247189881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314123593940 + 314123593941.

It is an arithmetic number, because the mean of its divisors is an integer number (314123593941).

Almost surely, 2^628247187881 is an apocalyptic number.

It is an amenable number.

628247187881 is a deficient number, since it is larger than the sum of its proper divisors (1).

628247187881 is an equidigital number, since it uses as much as digits as its factorization.

628247187881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19267584, while the sum is 62.

The spelling of 628247187881 in words is "six hundred twenty-eight billion, two hundred forty-seven million, one hundred eighty-seven thousand, eight hundred eighty-one".