161736251241 has 8 divisors (see below), whose sum is σ = 215679784320. Its totient is φ = 107808442832.

The previous prime is 161736251207. The next prime is 161736251251. The reversal of 161736251241 is 142152637161.

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

It is a cyclic number.

It is not a de Polignac number, because 161736251241 - 2¹⁵ = 161736218473 is a prime.

It is a super-2 number, since 2×161736251241² (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 161736251241.

It is not an unprimeable number, because it can be changed into a prime (161736251251) 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, 3907146 + ... + 3948323.

It is an arithmetic number, because the mean of its divisors is an integer number (26959973040).

Almost surely, 2^161736251241 is an apocalyptic number.

It is an amenable number.

161736251241 is a deficient number, since it is larger than the sum of its proper divisors (53943533079).

161736251241 is an equidigital number, since it uses as much as digits as its factorization.

161736251241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862335.

The product of its digits is 60480, while the sum is 39.

The spelling of 161736251241 in words is "one hundred sixty-one billion, seven hundred thirty-six million, two hundred fifty-one thousand, two hundred forty-one".