540432681 has 8 divisors (see below), whose sum is σ = 720719424. Its totient is φ = 360217200.

The previous prime is 540432667. The next prime is 540432691. The reversal of 540432681 is 186234045.

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

It is not a de Polignac number, because 540432681 - 2⁹ = 540432169 is a prime.

It is a super-2 number, since 2×540432681² = 584134965385695522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (540432631) 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, 3540 + ... + 33066.

It is an arithmetic number, because the mean of its divisors is an integer number (90089928).

Almost surely, 2^540432681 is an apocalyptic number.

It is an amenable number.

540432681 is a deficient number, since it is larger than the sum of its proper divisors (180286743).

540432681 is a wasteful number, since it uses less digits than its factorization.

540432681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35631.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 540432681 is about 23247.2080259114. The cubic root of 540432681 is about 814.5427226416.

The spelling of 540432681 in words is "five hundred forty million, four hundred thirty-two thousand, six hundred eighty-one".