161606505501098 has 24 divisors (see below), whose sum is σ = 282690070839684. Its totient is φ = 69087212880000.

The previous prime is 161606505501059. The next prime is 161606505501107. The reversal of 161606505501098 is 890105505606161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 149156807202529 + 12449698298569 = 12212977^2 + 3528413^2 .

It is a super-2 number, since 2×161606505501098² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2056127753 + ... + 2056206348.

Almost surely, 2^{161606505501098} is an apocalyptic number.

161606505501098 is a deficient number, since it is larger than the sum of its proper divisors (121083565338586).

161606505501098 is a wasteful number, since it uses less digits than its factorization.

161606505501098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112334518 (or 4112334511 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 161606505501098 in words is "one hundred sixty-one trillion, six hundred six billion, five hundred five million, five hundred one thousand, ninety-eight".