161537077797 has 16 divisors (see below), whose sum is σ = 228076316160. Its totient is φ = 101412492912.

The previous prime is 161537077781. The next prime is 161537077811. The reversal of 161537077797 is 797770735161.

It is not a de Polignac number, because 161537077797 - 2⁴ = 161537077781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161537077797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161537077777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8475463 + ... + 8494500.

It is an arithmetic number, because the mean of its divisors is an integer number (14254769760).

Almost surely, 2^161537077797 is an apocalyptic number.

It is an amenable number.

161537077797 is a deficient number, since it is larger than the sum of its proper divisors (66539238363).

161537077797 is a wasteful number, since it uses less digits than its factorization.

161537077797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16970152.

The product of its (nonzero) digits is 13613670, while the sum is 60.

The spelling of 161537077797 in words is "one hundred sixty-one billion, five hundred thirty-seven million, seventy-seven thousand, seven hundred ninety-seven".