51836873387 has 8 divisors (see below), whose sum is σ = 55971624240. Its totient is φ = 47723165280.

The previous prime is 51836873383. The next prime is 51836873437. The reversal of 51836873387 is 78337863815.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51836873387 - 2² = 51836873383 is a prime.

It is a super-2 number, since 2×51836873387² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51836873383) 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, 5255564 + ... + 5265417.

It is an arithmetic number, because the mean of its divisors is an integer number (6996453030).

Almost surely, 2^51836873387 is an apocalyptic number.

51836873387 is a deficient number, since it is larger than the sum of its proper divisors (4134750853).

51836873387 is a wasteful number, since it uses less digits than its factorization.

51836873387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10521373.

The product of its digits is 20321280, while the sum is 59.

The spelling of 51836873387 in words is "fifty-one billion, eight hundred thirty-six million, eight hundred seventy-three thousand, three hundred eighty-seven".