1631624055449 has 2 divisors, whose sum is σ = 1631624055450. Its totient is φ = 1631624055448.

The previous prime is 1631624055443. The next prime is 1631624055487. The reversal of 1631624055449 is 9445504261361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1458401615449 + 173222440000 = 1207643^2 + 416200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631624055449 - 2¹⁶ = 1631623989913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1631624055397 and 1631624055406.

It is not a weakly prime, because it can be changed into another prime (1631624055443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815812027724 + 815812027725.

It is an arithmetic number, because the mean of its divisors is an integer number (815812027725).

Almost surely, 2^{1631624055449} is an apocalyptic number.

It is an amenable number.

1631624055449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631624055449 is an equidigital number, since it uses as much as digits as its factorization.

1631624055449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 1631624055449 in words is "one trillion, six hundred thirty-one billion, six hundred twenty-four million, fifty-five thousand, four hundred forty-nine".