51931872782 has 8 divisors (see below), whose sum is σ = 82480033296. Its totient is φ = 24438528352.

The previous prime is 51931872767. The next prime is 51931872787. The reversal of 51931872782 is 28727813915.

51931872782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51931872787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763703978 + ... + 763704045.

It is an arithmetic number, because the mean of its divisors is an integer number (10310004162).

Almost surely, 2^51931872782 is an apocalyptic number.

51931872782 is a deficient number, since it is larger than the sum of its proper divisors (30548160514).

51931872782 is a wasteful number, since it uses less digits than its factorization.

51931872782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527408042.

The product of its digits is 1693440, while the sum is 53.

The spelling of 51931872782 in words is "fifty-one billion, nine hundred thirty-one million, eight hundred seventy-two thousand, seven hundred eighty-two".