719750321161 has 9 divisors (see below), whose sum is σ = 729044298381. Its totient is φ = 710573383884.

The previous prime is 719750321159. The next prime is 719750321177. The reversal of 719750321161 is 161123057917.

The square root of 719750321161 is 848381.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 719750321161 - 2¹ = 719750321159 is a prime.

It is a super-2 number, since 2×719750321161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (719750321561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 67016730 + ... + 67027468.

Almost surely, 2^719750321161 is an apocalyptic number.

719750321161 is the 848381-st square number.

719750321161 is the 424191-st centered octagonal number.

It is an amenable number.

719750321161 is a deficient number, since it is larger than the sum of its proper divisors (9293977220).

719750321161 is an frugal number, since it uses more digits than its factorization.

719750321161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21636 (or 10818 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 43.

The spelling of 719750321161 in words is "seven hundred nineteen billion, seven hundred fifty million, three hundred twenty-one thousand, one hundred sixty-one".