540761861 has 4 divisors (see below), whose sum is σ = 558205824. Its totient is φ = 523317900.

The previous prime is 540761821. The next prime is 540761867. The reversal of 540761861 is 168167045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168167045 = 5 ⋅33633409.

It is a cyclic number.

It is not a de Polignac number, because 540761861 - 2⁶ = 540761797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540761867) 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, 8721935 + ... + 8721996.

It is an arithmetic number, because the mean of its divisors is an integer number (139551456).

Almost surely, 2^540761861 is an apocalyptic number.

It is an amenable number.

540761861 is a deficient number, since it is larger than the sum of its proper divisors (17443963).

540761861 is a wasteful number, since it uses less digits than its factorization.

540761861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17443962.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 540761861 is about 23254.2869381110. The cubic root of 540761861 is about 814.7080696319.

The spelling of 540761861 in words is "five hundred forty million, seven hundred sixty-one thousand, eight hundred sixty-one".