51287312782 has 8 divisors (see below), whose sum is σ = 76933019376. Its totient is φ = 25642972992.

The previous prime is 51287312761. The next prime is 51287312803. The reversal of 51287312782 is 28721378215.

It is an interprime number because it is at equal distance from previous prime (51287312761) and next prime (51287312803).

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

It is a congruent number.

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, 242083 + ... + 401470.

It is an arithmetic number, because the mean of its divisors is an integer number (9616627422).

Almost surely, 2^51287312782 is an apocalyptic number.

51287312782 is a deficient number, since it is larger than the sum of its proper divisors (25645706594).

51287312782 is a wasteful number, since it uses less digits than its factorization.

51287312782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683402.

The product of its digits is 376320, while the sum is 46.

The spelling of 51287312782 in words is "fifty-one billion, two hundred eighty-seven million, three hundred twelve thousand, seven hundred eighty-two".