51854788378 has 8 divisors (see below), whose sum is σ = 79057300500. Its totient is φ = 25502354880.

The previous prime is 51854788331. The next prime is 51854788387. The reversal of 51854788378 is 87388745815.

It can be written as a sum of positive squares in 2 ways, for example, as 48811390489 + 3043397889 = 220933^2 + 55167^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212519503 + ... + 212519746.

Almost surely, 2^51854788378 is an apocalyptic number.

51854788378 is a deficient number, since it is larger than the sum of its proper divisors (27202512122).

51854788378 is a wasteful number, since it uses less digits than its factorization.

51854788378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425039312.

The product of its digits is 60211200, while the sum is 64.

The spelling of 51854788378 in words is "fifty-one billion, eight hundred fifty-four million, seven hundred eighty-eight thousand, three hundred seventy-eight".