168561754201 has 4 divisors (see below), whose sum is σ = 168597000832. Its totient is φ = 168526507572.

The previous prime is 168561754169. The next prime is 168561754243. The reversal of 168561754201 is 102457165861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 168561754201 - 2⁵ = 168561754169 is a prime.

It is a super-2 number, since 2×168561754201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168561754261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17616141 + ... + 17625706.

It is an arithmetic number, because the mean of its divisors is an integer number (42149250208).

Almost surely, 2^168561754201 is an apocalyptic number.

It is an amenable number.

168561754201 is a deficient number, since it is larger than the sum of its proper divisors (35246631).

168561754201 is an equidigital number, since it uses as much as digits as its factorization.

168561754201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35246630.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 168561754201 in words is "one hundred sixty-eight billion, five hundred sixty-one million, seven hundred fifty-four thousand, two hundred one".