540507116261 has 4 divisors (see below), whose sum is σ = 617722418592. Its totient is φ = 463291813932.

The previous prime is 540507116257. The next prime is 540507116263. The reversal of 540507116261 is 162611705045.

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.

It is a cyclic number.

It is not a de Polignac number, because 540507116261 - 2² = 540507116257 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 (540507116263) 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, 38607651155 + ... + 38607651168.

It is an arithmetic number, because the mean of its divisors is an integer number (154430604648).

Almost surely, 2^540507116261 is an apocalyptic number.

It is an amenable number.

540507116261 is a deficient number, since it is larger than the sum of its proper divisors (77215302331).

540507116261 is an equidigital number, since it uses as much as digits as its factorization.

540507116261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77215302330.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 540507116261 in words is "five hundred forty billion, five hundred seven million, one hundred sixteen thousand, two hundred sixty-one".