161107490297 has 4 divisors (see below), whose sum is σ = 173500374180. Its totient is φ = 148714606416.

The previous prime is 161107490287. The next prime is 161107490347. The reversal of 161107490297 is 792094701161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 792094701161 = 15131 ⋅52349131.

It can be written as a sum of positive squares in 2 ways, for example, as 87136545721 + 73970944576 = 295189^2 + 271976^2 .

It is a cyclic number.

It is not a de Polignac number, because 161107490297 - 2¹⁶ = 161107424761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161107490287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6196441922 + ... + 6196441947.

It is an arithmetic number, because the mean of its divisors is an integer number (43375093545).

Almost surely, 2^161107490297 is an apocalyptic number.

It is an amenable number.

161107490297 is a deficient number, since it is larger than the sum of its proper divisors (12392883883).

161107490297 is a wasteful number, since it uses less digits than its factorization.

161107490297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392883882.

The product of its (nonzero) digits is 190512, while the sum is 47.

The spelling of 161107490297 in words is "one hundred sixty-one billion, one hundred seven million, four hundred ninety thousand, two hundred ninety-seven".