51853491536 has 160 divisors (see below), whose sum is σ = 133745154048. Its totient is φ = 18874437120.

The previous prime is 51853491533. The next prime is 51853491539. The reversal of 51853491536 is 63519435815.

It is an interprime number because it is at equal distance from previous prime (51853491533) and next prime (51853491539).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51853491533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1197170 + ... + 1239726.

Almost surely, 2^51853491536 is an apocalyptic number.

51853491536 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51853491536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66872577024).

51853491536 is an abundant number, since it is smaller than the sum of its proper divisors (81891662512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51853491536 is a wasteful number, since it uses less digits than its factorization.

51853491536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42649 (or 42643 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 50.

The spelling of 51853491536 in words is "fifty-one billion, eight hundred fifty-three million, four hundred ninety-one thousand, five hundred thirty-six".