51684150815 has 8 divisors (see below), whose sum is σ = 67659252048. Its totient is φ = 37588473280.

The previous prime is 51684150799. The next prime is 51684150823. The reversal of 51684150815 is 51805148615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51684150815 - 2⁴ = 51684150799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469855862 + ... + 469855971.

It is an arithmetic number, because the mean of its divisors is an integer number (8457406506).

Almost surely, 2^51684150815 is an apocalyptic number.

51684150815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51684150815 is a deficient number, since it is larger than the sum of its proper divisors (15975101233).

51684150815 is a wasteful number, since it uses less digits than its factorization.

51684150815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939711849.

The product of its (nonzero) digits is 192000, while the sum is 44.

The spelling of 51684150815 in words is "fifty-one billion, six hundred eighty-four million, one hundred fifty thousand, eight hundred fifteen".