51854522545815 has 64 divisors (see below), whose sum is σ = 91422911803392. Its totient is φ = 24888013056000.

The previous prime is 51854522545801. The next prime is 51854522545849.

It is a happy number.

51854522545815 is nontrivially palindromic in base 10.

51854522545815 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51854522545815 - 2¹⁹ = 51854522021527 is a prime.

It is a super-2 number, since 2×51854522545815² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89819919 + ... + 90395391.

It is an arithmetic number, because the mean of its divisors is an integer number (1428482996928).

Almost surely, 2^{51854522545815} is an apocalyptic number.

51854522545815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51854522545815 is a deficient number, since it is larger than the sum of its proper divisors (39568389257577).

51854522545815 is a wasteful number, since it uses less digits than its factorization.

51854522545815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581000.

The product of its digits is 64000000, while the sum is 60.

The spelling of 51854522545815 in words is "fifty-one trillion, eight hundred fifty-four billion, five hundred twenty-two million, five hundred forty-five thousand, eight hundred fifteen".