178930000649 has 2 divisors, whose sum is σ = 178930000650. Its totient is φ = 178930000648.

The previous prime is 178930000573. The next prime is 178930000687. The reversal of 178930000649 is 946000039871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164933454400 + 13996546249 = 406120^2 + 118307^2 .

It is a cyclic number.

It is not a de Polignac number, because 178930000649 - 2⁸ = 178930000393 is a prime.

It is a super-2 number, since 2×178930000649² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (178930020649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89465000324 + 89465000325.

It is an arithmetic number, because the mean of its divisors is an integer number (89465000325).

Almost surely, 2^178930000649 is an apocalyptic number.

It is an amenable number.

178930000649 is a deficient number, since it is larger than the sum of its proper divisors (1).

178930000649 is an equidigital number, since it uses as much as digits as its factorization.

178930000649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 178930000649 in words is "one hundred seventy-eight billion, nine hundred thirty million, six hundred forty-nine", and thus it is an aban number.