161704740157 has 8 divisors (see below), whose sum is σ = 162168105600. Its totient is φ = 161241499104.

The previous prime is 161704740139. The next prime is 161704740161. The reversal of 161704740157 is 751047407161.

161704740157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161704740157 is a prime.

It is a super-2 number, since 2×161704740157² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161704710157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2989569 + ... + 3043177.

It is an arithmetic number, because the mean of its divisors is an integer number (20271013200).

Almost surely, 2^161704740157 is an apocalyptic number.

It is an amenable number.

161704740157 is a deficient number, since it is larger than the sum of its proper divisors (463365443).

161704740157 is an equidigital number, since it uses as much as digits as its factorization.

161704740157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62195.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 161704740157 in words is "one hundred sixty-one billion, seven hundred four million, seven hundred forty thousand, one hundred fifty-seven".