51647085287 has 24 divisors (see below), whose sum is σ = 61306328160. Its totient is φ = 42596305920.

The previous prime is 51647085257. The next prime is 51647085299. The reversal of 51647085287 is 78258074615.

It is not a de Polignac number, because 51647085287 - 2¹⁶ = 51647019751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51647085247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1512539 + ... + 1546307.

It is an arithmetic number, because the mean of its divisors is an integer number (2554430340).

Almost surely, 2^51647085287 is an apocalyptic number.

51647085287 is a deficient number, since it is larger than the sum of its proper divisors (9659242873).

51647085287 is an equidigital number, since it uses as much as digits as its factorization.

51647085287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33963 (or 33890 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 51647085287 in words is "fifty-one billion, six hundred forty-seven million, eighty-five thousand, two hundred eighty-seven".