1639143632957 has 2 divisors, whose sum is σ = 1639143632958. Its totient is φ = 1639143632956.

The previous prime is 1639143632923. The next prime is 1639143633031. The reversal of 1639143632957 is 7592363419361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371571241881 + 267572391076 = 1171141^2 + 517274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1639143632957 - 2⁸ = 1639143632701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1639143632896 and 1639143632905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1639143652957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819571816478 + 819571816479.

It is an arithmetic number, because the mean of its divisors is an integer number (819571816479).

Almost surely, 2^{1639143632957} is an apocalyptic number.

It is an amenable number.

1639143632957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639143632957 is an equidigital number, since it uses as much as digits as its factorization.

1639143632957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 59.

The spelling of 1639143632957 in words is "one trillion, six hundred thirty-nine billion, one hundred forty-three million, six hundred thirty-two thousand, nine hundred fifty-seven".