161606575767 has 48 divisors (see below), whose sum is σ = 277231954272. Its totient is φ = 82939127040.

The previous prime is 161606575763. The next prime is 161606575783. The reversal of 161606575767 is 767575606161.

It is not a de Polignac number, because 161606575767 - 2² = 161606575763 is a prime.

It is a super-2 number, since 2×161606575767² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606575763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1072084 + ... + 1213497.

It is an arithmetic number, because the mean of its divisors is an integer number (5775665714).

Almost surely, 2^161606575767 is an apocalyptic number.

161606575767 is a deficient number, since it is larger than the sum of its proper divisors (115625378505).

161606575767 is a wasteful number, since it uses less digits than its factorization.

161606575767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285648 (or 2285641 counting only the distinct ones).

The product of its (nonzero) digits is 11113200, while the sum is 57.

The spelling of 161606575767 in words is "one hundred sixty-one billion, six hundred six million, five hundred seventy-five thousand, seven hundred sixty-seven".