1648129451 has 2 divisors, whose sum is σ = 1648129452. Its totient is φ = 1648129450.

The previous prime is 1648129409. The next prime is 1648129489. The reversal of 1648129451 is 1549218461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1648129451 - 2⁶ = 1648129387 is a prime.

It is a super-2 number, since 2×1648129451² = 5432661374507122802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1648129399 and 1648129408.

It is not a weakly prime, because it can be changed into another prime (1648129751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824064725 + 824064726.

It is an arithmetic number, because the mean of its divisors is an integer number (824064726).

Almost surely, 2^1648129451 is an apocalyptic number.

1648129451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648129451 is an equidigital number, since it uses as much as digits as its factorization.

1648129451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 1648129451 is about 40597.1606273148. The cubic root of 1648129451 is about 1181.2190435007.

The spelling of 1648129451 in words is "one billion, six hundred forty-eight million, one hundred twenty-nine thousand, four hundred fifty-one".