51887251765 has 8 divisors (see below), whose sum is σ = 64273241088. Its totient is φ = 40170775440.

The previous prime is 51887251763. The next prime is 51887251769. The reversal of 51887251765 is 56715278815.

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

It is not a de Polignac number, because 51887251765 - 2¹ = 51887251763 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 (51887251763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167378077 + ... + 167378386.

It is an arithmetic number, because the mean of its divisors is an integer number (8034155136).

Almost surely, 2^51887251765 is an apocalyptic number.

It is an amenable number.

51887251765 is a deficient number, since it is larger than the sum of its proper divisors (12385989323).

51887251765 is a wasteful number, since it uses less digits than its factorization.

51887251765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334756499.

The product of its digits is 4704000, while the sum is 55.

The spelling of 51887251765 in words is "fifty-one billion, eight hundred eighty-seven million, two hundred fifty-one thousand, seven hundred sixty-five".