51540341235511 has 4 divisors (see below), whose sum is σ = 51579416552400. Its totient is φ = 51501265918624.

The previous prime is 51540341235491. The next prime is 51540341235521. The reversal of 51540341235511 is 11553214304515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51540341235511 - 2²³ = 51540332846903 is a prime.

It is a super-2 number, since 2×51540341235511² (a number of 28 digits) contains 22 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 (51540341235521) 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, 19537656466 + ... + 19537659103.

It is an arithmetic number, because the mean of its divisors is an integer number (12894854138100).

Almost surely, 2^{51540341235511} is an apocalyptic number.

51540341235511 is a deficient number, since it is larger than the sum of its proper divisors (39075316889).

51540341235511 is a wasteful number, since it uses less digits than its factorization.

51540341235511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39075316888.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 51540341235511 in words is "fifty-one trillion, five hundred forty billion, three hundred forty-one million, two hundred thirty-five thousand, five hundred eleven".