15648461 has 2 divisors, whose sum is σ = 15648462. Its totient is φ = 15648460.

The previous prime is 15648433. The next prime is 15648463. The reversal of 15648461 is 16484651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 5851561 = 3130^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 15648461 - 2¹⁸ = 15386317 is a prime.

Together with 15648463, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1009889 and since 15648461 and 1009889 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15648463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7824230 + 7824231.

It is an arithmetic number, because the mean of its divisors is an integer number (7824231).

Almost surely, 2^15648461 is an apocalyptic number.

It is an amenable number.

15648461 is a deficient number, since it is larger than the sum of its proper divisors (1).

15648461 is an equidigital number, since it uses as much as digits as its factorization.

15648461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 15648461 is about 3955.8135699246. The cubic root of 15648461 is about 250.1250627601.

The spelling of 15648461 in words is "fifteen million, six hundred forty-eight thousand, four hundred sixty-one".