161662577757 has 8 divisors (see below), whose sum is σ = 215608517280. Its totient is φ = 107745845040.

The previous prime is 161662577689. The next prime is 161662577759. The reversal of 161662577757 is 757775266161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-161662577757 is a prime.

It is a super-2 number, since 2×161662577757² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161662577757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161662577759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7288782 + ... + 7310927.

It is an arithmetic number, because the mean of its divisors is an integer number (26951064660).

Almost surely, 2^161662577757 is an apocalyptic number.

It is an amenable number.

161662577757 is a deficient number, since it is larger than the sum of its proper divisors (53945939523).

161662577757 is a wasteful number, since it uses less digits than its factorization.

161662577757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14603403.

The product of its digits is 25930800, while the sum is 60.

The spelling of 161662577757 in words is "one hundred sixty-one billion, six hundred sixty-two million, five hundred seventy-seven thousand, seven hundred fifty-seven".