319401816061 has 4 divisors (see below), whose sum is σ = 319483949500. Its totient is φ = 319319682624.

The previous prime is 319401816053. The next prime is 319401816079. The reversal of 319401816061 is 160618104913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160618104913 = 7 ⋅22945443559.

It can be written as a sum of positive squares in 2 ways, for example, as 245811690436 + 73590125625 = 495794^2 + 271275^2 .

It is a cyclic number.

It is not a de Polignac number, because 319401816061 - 2³ = 319401816053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319401816011) 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, 41060886 + ... + 41068663.

It is an arithmetic number, because the mean of its divisors is an integer number (79870987375).

Almost surely, 2^319401816061 is an apocalyptic number.

It is an amenable number.

319401816061 is a deficient number, since it is larger than the sum of its proper divisors (82133439).

319401816061 is an equidigital number, since it uses as much as digits as its factorization.

319401816061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82133438.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 319401816061 in words is "three hundred nineteen billion, four hundred one million, eight hundred sixteen thousand, sixty-one".