161196633 has 12 divisors (see below), whose sum is σ = 250750500. Its totient is φ = 99197856.

The previous prime is 161196617. The next prime is 161196641. The reversal of 161196633 is 336691161.

161196633 is a `hidden beast` number, since 1 + 6 + 1 + 19 + 6 + 633 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49112064 + 112084569 = 7008^2 + 10587^2 .

It is not a de Polignac number, because 161196633 - 2⁴ = 161196617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161196613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688758 + ... + 688991.

It is an arithmetic number, because the mean of its divisors is an integer number (20895875).

Almost surely, 2^161196633 is an apocalyptic number.

161196633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161196633 is a deficient number, since it is larger than the sum of its proper divisors (89553867).

161196633 is a wasteful number, since it uses less digits than its factorization.

161196633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377768 (or 1377765 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 161196633 is about 12696.3236017361. The cubic root of 161196633 is about 544.2335639667.

The spelling of 161196633 in words is "one hundred sixty-one million, one hundred ninety-six thousand, six hundred thirty-three".