105840519551 has 4 divisors (see below), whose sum is σ = 113982097992. Its totient is φ = 97698941112.

The previous prime is 105840519541. The next prime is 105840519647. The reversal of 105840519551 is 155915048501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105840519551 is a prime.

It is a super-2 number, since 2×105840519551² (a number of 23 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 (105840519511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4070789201 + ... + 4070789226.

It is an arithmetic number, because the mean of its divisors is an integer number (28495524498).

Almost surely, 2^105840519551 is an apocalyptic number.

105840519551 is a deficient number, since it is larger than the sum of its proper divisors (8141578441).

105840519551 is an equidigital number, since it uses as much as digits as its factorization.

105840519551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8141578440.

The product of its (nonzero) digits is 180000, while the sum is 44.

The spelling of 105840519551 in words is "one hundred five billion, eight hundred forty million, five hundred nineteen thousand, five hundred fifty-one".