161765602627 has 4 divisors (see below), whose sum is σ = 162586748016. Its totient is φ = 160944457240.

The previous prime is 161765602619. The next prime is 161765602643. The reversal of 161765602627 is 726206567161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161765602627 - 2³ = 161765602619 is a prime.

It is a super-2 number, since 2×161765602627² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161765602927) 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, 410572399 + ... + 410572792.

It is an arithmetic number, because the mean of its divisors is an integer number (40646687004).

Almost surely, 2^161765602627 is an apocalyptic number.

161765602627 is a deficient number, since it is larger than the sum of its proper divisors (821145389).

161765602627 is an equidigital number, since it uses as much as digits as its factorization.

161765602627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821145388.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 161765602627 in words is "one hundred sixty-one billion, seven hundred sixty-five million, six hundred two thousand, six hundred twenty-seven".