161785701267 has 8 divisors (see below), whose sum is σ = 220730879424. Its totient is φ = 105348828648.

The previous prime is 161785701247. The next prime is 161785701307. The reversal of 161785701267 is 762107587161.

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

It is not a de Polignac number, because 161785701267 - 2¹⁶ = 161785635731 is a prime.

It is a super-2 number, since 2×161785701267² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161785701227) 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, 627076233 + ... + 627076490.

It is an arithmetic number, because the mean of its divisors is an integer number (27591359928).

Almost surely, 2^161785701267 is an apocalyptic number.

161785701267 is a deficient number, since it is larger than the sum of its proper divisors (58945178157).

161785701267 is a wasteful number, since it uses less digits than its factorization.

161785701267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254152769.

The product of its (nonzero) digits is 987840, while the sum is 51.

The spelling of 161785701267 in words is "one hundred sixty-one billion, seven hundred eighty-five million, seven hundred one thousand, two hundred sixty-seven".