1504627661 has 2 divisors, whose sum is σ = 1504627662. Its totient is φ = 1504627660.

The previous prime is 1504627609. The next prime is 1504627667. The reversal of 1504627661 is 1667264051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296720100 + 207907561 = 36010^2 + 14419^2 .

It is an emirp because it is prime and its reverse (1667264051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1504627661 - 2¹⁰ = 1504626637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1504627667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752313830 + 752313831.

It is an arithmetic number, because the mean of its divisors is an integer number (752313831).

Almost surely, 2^1504627661 is an apocalyptic number.

It is an amenable number.

1504627661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1504627661 is an equidigital number, since it uses as much as digits as its factorization.

1504627661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1504627661 is about 38789.5303013584. The cubic root of 1504627661 is about 1145.8902228075.

The spelling of 1504627661 in words is "one billion, five hundred four million, six hundred twenty-seven thousand, six hundred sixty-one".