1631479449533 has 2 divisors, whose sum is σ = 1631479449534. Its totient is φ = 1631479449532.

The previous prime is 1631479449529. The next prime is 1631479449629. The reversal of 1631479449533 is 3359449741361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1631387998564 + 91450969 = 1277258^2 + 9563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631479449533 - 2² = 1631479449529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631479449503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815739724766 + 815739724767.

It is an arithmetic number, because the mean of its divisors is an integer number (815739724767).

Almost surely, 2^{1631479449533} is an apocalyptic number.

It is an amenable number.

1631479449533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631479449533 is an equidigital number, since it uses as much as digits as its factorization.

1631479449533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 59.

The spelling of 1631479449533 in words is "one trillion, six hundred thirty-one billion, four hundred seventy-nine million, four hundred forty-nine thousand, five hundred thirty-three".