51838835501687 has 4 divisors (see below), whose sum is σ = 55826438232600. Its totient is φ = 47851232770776.

The previous prime is 51838835501681. The next prime is 51838835501741. The reversal of 51838835501687 is 78610553883815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51838835501687 - 2¹⁶ = 51838835436151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51838835501681) 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, 1993801365437 + ... + 1993801365462.

It is an arithmetic number, because the mean of its divisors is an integer number (13956609558150).

Almost surely, 2^{51838835501687} is an apocalyptic number.

51838835501687 is a deficient number, since it is larger than the sum of its proper divisors (3987602730913).

51838835501687 is a wasteful number, since it uses less digits than its factorization.

51838835501687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987602730912.

The product of its (nonzero) digits is 193536000, while the sum is 68.

The spelling of 51838835501687 in words is "fifty-one trillion, eight hundred thirty-eight billion, eight hundred thirty-five million, five hundred one thousand, six hundred eighty-seven".