540262521523 has 4 divisors (see below), whose sum is σ = 540535521240. Its totient is φ = 539989521808.

The previous prime is 540262521439. The next prime is 540262521551. The reversal of 540262521523 is 325125262045.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540262521523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540262521553) 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, 136496890 + ... + 136500847.

It is an arithmetic number, because the mean of its divisors is an integer number (135133880310).

Almost surely, 2^540262521523 is an apocalyptic number.

540262521523 is a deficient number, since it is larger than the sum of its proper divisors (272999717).

540262521523 is a wasteful number, since it uses less digits than its factorization.

540262521523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272999716.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 540262521523 its reverse (325125262045), we get a palindrome (865387783568).

The spelling of 540262521523 in words is "five hundred forty billion, two hundred sixty-two million, five hundred twenty-one thousand, five hundred twenty-three".