161641098 has 12 divisors (see below), whose sum is σ = 350222418. Its totient is φ = 53880360.

The previous prime is 161641087. The next prime is 161641111. The reversal of 161641098 is 890146161.

It is a happy number.

161641098 is a `hidden beast` number, since 1 + 6 + 1 + 641 + 0 + 9 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 158080329 + 3560769 = 12573^2 + 1887^2 .

It is a super-2 number, since 2×161641098² = 52255689125291208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4490013 + ... + 4490048.

Almost surely, 2^161641098 is an apocalyptic number.

161641098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161641098 is an abundant number, since it is smaller than the sum of its proper divisors (188581320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161641098 is a wasteful number, since it uses less digits than its factorization.

161641098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980069 (or 8980066 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 161641098 is about 12713.8152416967. The cubic root of 161641098 is about 544.7333072183.

The spelling of 161641098 in words is "one hundred sixty-one million, six hundred forty-one thousand, ninety-eight".