540006644651 has 4 divisors (see below), whose sum is σ = 540028502832. Its totient is φ = 539984786472.

The previous prime is 540006644633. The next prime is 540006644657. The reversal of 540006644651 is 156446600045.

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

It is a cyclic number.

It is not a de Polignac number, because 540006644651 - 2²² = 540002450347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 540006644599 and 540006644608.

It is not an unprimeable number, because it can be changed into a prime (540006644657) 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, 10891991 + ... + 10941456.

It is an arithmetic number, because the mean of its divisors is an integer number (135007125708).

Almost surely, 2^540006644651 is an apocalyptic number.

540006644651 is a deficient number, since it is larger than the sum of its proper divisors (21858181).

540006644651 is a wasteful number, since it uses less digits than its factorization.

540006644651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21858180.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 540006644651 in words is "five hundred forty billion, six million, six hundred forty-four thousand, six hundred fifty-one".