540688553 has 8 divisors (see below), whose sum is σ = 572938920. Its totient is φ = 508487680.

The previous prime is 540688549. The next prime is 540688559. The reversal of 540688553 is 355886045.

It can be written as a sum of positive squares in 4 ways, for example, as 10445824 + 530242729 = 3232^2 + 23027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 540688553 - 2² = 540688549 is a prime.

It is a super-2 number, since 2×540688553² = 584688222690467618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540688559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11453 + ... + 34821.

It is an arithmetic number, because the mean of its divisors is an integer number (71617365).

Almost surely, 2^540688553 is an apocalyptic number.

It is an amenable number.

540688553 is a deficient number, since it is larger than the sum of its proper divisors (32250367).

540688553 is a wasteful number, since it uses less digits than its factorization.

540688553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24747.

The product of its (nonzero) digits is 576000, while the sum is 44.

The square root of 540688553 is about 23252.7106591898. The cubic root of 540688553 is about 814.6712528601.

The spelling of 540688553 in words is "five hundred forty million, six hundred eighty-eight thousand, five hundred fifty-three".