1646161031 has 2 divisors, whose sum is σ = 1646161032. Its totient is φ = 1646161030.

The previous prime is 1646161019. The next prime is 1646161063. The reversal of 1646161031 is 1301616461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1646161031 - 2¹⁸ = 1645898887 is a prime.

It is a super-2 number, since 2×1646161031² = 5419692279965965922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1646160985 and 1646161003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646161091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823080515 + 823080516.

It is an arithmetic number, because the mean of its divisors is an integer number (823080516).

Almost surely, 2^1646161031 is an apocalyptic number.

1646161031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646161031 is an equidigital number, since it uses as much as digits as its factorization.

1646161031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1646161031 is about 40572.9100632429. The cubic root of 1646161031 is about 1180.7485987657.

Adding to 1646161031 its reverse (1301616461), we get a palindrome (2947777492).

The spelling of 1646161031 in words is "one billion, six hundred forty-six million, one hundred sixty-one thousand, thirty-one".