627658479949 has 2 divisors, whose sum is σ = 627658479950. Its totient is φ = 627658479948.

The previous prime is 627658479907. The next prime is 627658479961. The reversal of 627658479949 is 949974856726.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475368880900 + 152289599049 = 689470^2 + 390243^2 .

It is a cyclic number.

It is not a de Polignac number, because 627658479949 - 2¹⁵ = 627658447181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (627658479449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313829239974 + 313829239975.

It is an arithmetic number, because the mean of its divisors is an integer number (313829239975).

Almost surely, 2^627658479949 is an apocalyptic number.

It is an amenable number.

627658479949 is a deficient number, since it is larger than the sum of its proper divisors (1).

627658479949 is an equidigital number, since it uses as much as digits as its factorization.

627658479949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1646023680, while the sum is 76.

The spelling of 627658479949 in words is "six hundred twenty-seven billion, six hundred fifty-eight million, four hundred seventy-nine thousand, nine hundred forty-nine".