161485797 has 16 divisors (see below), whose sum is σ = 241238592. Its totient is φ = 95224320.

The previous prime is 161485781. The next prime is 161485801. The reversal of 161485797 is 797584161.

It is not a de Polignac number, because 161485797 - 2⁴ = 161485781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161485097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64908 + ... + 67349.

It is an arithmetic number, because the mean of its divisors is an integer number (15077412).

Almost surely, 2^161485797 is an apocalyptic number.

It is an amenable number.

161485797 is a deficient number, since it is larger than the sum of its proper divisors (79752795).

161485797 is a wasteful number, since it uses less digits than its factorization.

161485797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132308.

The product of its digits is 423360, while the sum is 48.

The square root of 161485797 is about 12707.7062052913. The cubic root of 161485797 is about 544.5587956285.

It can be divided in two parts, 16148 and 5797, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 161485797 in words is "one hundred sixty-one million, four hundred eighty-five thousand, seven hundred ninety-seven".