540635261 has 8 divisors (see below), whose sum is σ = 549195744. Its totient is φ = 532089360.

The previous prime is 540635239. The next prime is 540635273. The reversal of 540635261 is 162536045.

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

It is a cyclic number.

It is not a de Polignac number, because 540635261 - 2²⁶ = 473526397 is a prime.

It is a super-4 number, since 4×540635261⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540635201) 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, 89606 + ... + 95448.

It is an arithmetic number, because the mean of its divisors is an integer number (68649468).

Almost surely, 2^540635261 is an apocalyptic number.

It is an amenable number.

540635261 is a deficient number, since it is larger than the sum of its proper divisors (8560483).

540635261 is a wasteful number, since it uses less digits than its factorization.

540635261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 540635261 is about 23251.5647000369. The cubic root of 540635261 is about 814.6444864424.

The spelling of 540635261 in words is "five hundred forty million, six hundred thirty-five thousand, two hundred sixty-one".