51634478218782 has 32 divisors (see below), whose sum is σ = 109267398731520. Its totient is φ = 16221139591680.

The previous prime is 51634478218759. The next prime is 51634478218793. The reversal of 51634478218782 is 28781287443615.

It is a super-2 number, since 2×51634478218782² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173382194 + ... + 1173426197.

It is an arithmetic number, because the mean of its divisors is an integer number (3414606210360).

Almost surely, 2^{51634478218782} is an apocalyptic number.

51634478218782 is an abundant number, since it is smaller than the sum of its proper divisors (57632920512738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51634478218782 is a wasteful number, since it uses less digits than its factorization.

51634478218782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346808608.

The product of its digits is 144506880, while the sum is 66.

The spelling of 51634478218782 in words is "fifty-one trillion, six hundred thirty-four billion, four hundred seventy-eight million, two hundred eighteen thousand, seven hundred eighty-two".