161606115097474 has 4 divisors (see below), whose sum is σ = 242409172646214. Its totient is φ = 80803057548736.

The previous prime is 161606115097433. The next prime is 161606115097519. The reversal of 161606115097474 is 474790511606161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 103191201106249 + 58414913991225 = 10158307^2 + 7642965^2 .

It is a super-2 number, since 2×161606115097474² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40401528774367 + ... + 40401528774370.

Almost surely, 2^{161606115097474} is an apocalyptic number.

161606115097474 is a deficient number, since it is larger than the sum of its proper divisors (80803057548740).

161606115097474 is an equidigital number, since it uses as much as digits as its factorization.

161606115097474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80803057548739.

The product of its (nonzero) digits is 7620480, while the sum is 58.

The spelling of 161606115097474 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred fifteen million, ninety-seven thousand, four hundred seventy-four".