540256651405 has 4 divisors (see below), whose sum is σ = 648307981692. Its totient is φ = 432205321120.

The previous prime is 540256651351. The next prime is 540256651409. The reversal of 540256651405 is 504156652045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504156652045 = 5 ⋅100831330409.

It can be written as a sum of positive squares in 2 ways, for example, as 301021211716 + 239235439689 = 548654^2 + 489117^2 .

It is not a de Polignac number, because 540256651405 - 2²⁷ = 540122433677 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 (540256651409) 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, 54025665136 + ... + 54025665145.

It is an arithmetic number, because the mean of its divisors is an integer number (162076995423).

Almost surely, 2^540256651405 is an apocalyptic number.

It is an amenable number.

540256651405 is a deficient number, since it is larger than the sum of its proper divisors (108051330287).

540256651405 is a wasteful number, since it uses less digits than its factorization.

540256651405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108051330286.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 540256651405 in words is "five hundred forty billion, two hundred fifty-six million, six hundred fifty-one thousand, four hundred five".