161408763 has 24 divisors (see below), whose sum is σ = 244565568. Its totient is φ = 102460032.

The previous prime is 161408749. The next prime is 161408777. The reversal of 161408763 is 367804161.

It is an interprime number because it is at equal distance from previous prime (161408749) and next prime (161408777).

It is not a de Polignac number, because 161408763 - 2⁴ = 161408747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161408563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10495 + ... + 20807.

It is an arithmetic number, because the mean of its divisors is an integer number (10190232).

Almost surely, 2^161408763 is an apocalyptic number.

161408763 is a deficient number, since it is larger than the sum of its proper divisors (83156805).

161408763 is a wasteful number, since it uses less digits than its factorization.

161408763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10403 (or 10400 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 161408763 is about 12704.6748482596. The cubic root of 161408763 is about 544.4721910782.

The spelling of 161408763 in words is "one hundred sixty-one million, four hundred eight thousand, seven hundred sixty-three".