161662084472639 has 2 divisors, whose sum is σ = 161662084472640. Its totient is φ = 161662084472638.

The previous prime is 161662084472611. The next prime is 161662084472659. The reversal of 161662084472639 is 936274480266161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161662084472639 is a prime.

It is a super-2 number, since 2×161662084472639² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161662084472659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80831042236319 + 80831042236320.

It is an arithmetic number, because the mean of its divisors is an integer number (80831042236320).

Almost surely, 2^{161662084472639} is an apocalyptic number.

161662084472639 is a deficient number, since it is larger than the sum of its proper divisors (1).

161662084472639 is an equidigital number, since it uses as much as digits as its factorization.

161662084472639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125411328, while the sum is 65.

The spelling of 161662084472639 in words is "one hundred sixty-one trillion, six hundred sixty-two billion, eighty-four million, four hundred seventy-two thousand, six hundred thirty-nine".