1581038055629 has 2 divisors, whose sum is σ = 1581038055630. Its totient is φ = 1581038055628.

The previous prime is 1581038055607. The next prime is 1581038055637. The reversal of 1581038055629 is 9265508301851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562812515625 + 18225540004 = 1250125^2 + 135002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1581038055629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1581038055229) 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, 790519027814 + 790519027815.

It is an arithmetic number, because the mean of its divisors is an integer number (790519027815).

Almost surely, 2^{1581038055629} is an apocalyptic number.

It is an amenable number.

1581038055629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581038055629 is an equidigital number, since it uses as much as digits as its factorization.

1581038055629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 53.

The spelling of 1581038055629 in words is "one trillion, five hundred eighty-one billion, thirty-eight million, fifty-five thousand, six hundred twenty-nine".