1648684537 has 2 divisors, whose sum is σ = 1648684538. Its totient is φ = 1648684536.

The previous prime is 1648684507. The next prime is 1648684559. The reversal of 1648684537 is 7354868461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1634099776 + 14584761 = 40424^2 + 3819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648684537 - 2²³ = 1640295929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1648684507) 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, 824342268 + 824342269.

It is an arithmetic number, because the mean of its divisors is an integer number (824342269).

Almost surely, 2^1648684537 is an apocalyptic number.

It is an amenable number.

1648684537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648684537 is an equidigital number, since it uses as much as digits as its factorization.

1648684537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 52.

The square root of 1648684537 is about 40603.9965643777. The cubic root of 1648684537 is about 1181.3516391851.

The spelling of 1648684537 in words is "one billion, six hundred forty-eight million, six hundred eighty-four thousand, five hundred thirty-seven".