1639149085831 has 2 divisors, whose sum is σ = 1639149085832. Its totient is φ = 1639149085830.

The previous prime is 1639149085817. The next prime is 1639149085897. The reversal of 1639149085831 is 1385809419361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1639149085831 - 2⁷ = 1639149085703 is a prime.

It is a super-2 number, since 2×1639149085831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1639140085831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819574542915 + 819574542916.

It is an arithmetic number, because the mean of its divisors is an integer number (819574542916).

Almost surely, 2^{1639149085831} is an apocalyptic number.

1639149085831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639149085831 is an equidigital number, since it uses as much as digits as its factorization.

1639149085831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 1639149085831 in words is "one trillion, six hundred thirty-nine billion, one hundred forty-nine million, eighty-five thousand, eight hundred thirty-one".