326407777861 has 6 divisors (see below), whose sum is σ = 358778797286. Its totient is φ = 296734343400.

The previous prime is 326407777849. The next prime is 326407777939. The reversal of 326407777861 is 168777704623.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 296120988900 + 30286788961 = 544170^2 + 174031^2 .

It is not a de Polignac number, because 326407777861 - 2¹³ = 326407769669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 326407777796 and 326407777805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326407777831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1348792350 + ... + 1348792591.

Almost surely, 2^326407777861 is an apocalyptic number.

It is an amenable number.

326407777861 is a deficient number, since it is larger than the sum of its proper divisors (32371019425).

326407777861 is a wasteful number, since it uses less digits than its factorization.

326407777861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697584963 (or 2697584952 counting only the distinct ones).

The product of its (nonzero) digits is 16595712, while the sum is 58.

The spelling of 326407777861 in words is "three hundred twenty-six billion, four hundred seven million, seven hundred seventy-seven thousand, eight hundred sixty-one".