5545326781 has 4 divisors (see below), whose sum is σ = 5871522492. Its totient is φ = 5219131072.

The previous prime is 5545326769. The next prime is 5545326811. The reversal of 5545326781 is 1876235455.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5170904281 + 374422500 = 71909^2 + 19350^2 .

It is a cyclic number.

It is not a de Polignac number, because 5545326781 - 2⁷ = 5545326653 is a prime.

It is a super-2 number, since 2×5545326781² = 61501298216151643922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5545326881) 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, 163097830 + ... + 163097863.

It is an arithmetic number, because the mean of its divisors is an integer number (1467880623).

Almost surely, 2^5545326781 is an apocalyptic number.

It is an amenable number.

5545326781 is a deficient number, since it is larger than the sum of its proper divisors (326195711).

5545326781 is a wasteful number, since it uses less digits than its factorization.

5545326781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326195710.

The product of its digits is 1008000, while the sum is 46.

The square root of 5545326781 is about 74466.9509312688. The cubic root of 5545326781 is about 1770.0099780258.

The spelling of 5545326781 in words is "five billion, five hundred forty-five million, three hundred twenty-six thousand, seven hundred eighty-one".