51869647200 has 144 divisors (see below), whose sum is σ = 192955150080. Its totient is φ = 11855915520.

The previous prime is 51869647177. The next prime is 51869647201. The reversal of 51869647200 is 274696815.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51869647200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51869647201) 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, 1526940 + ... + 1560539.

It is an arithmetic number, because the mean of its divisors is an integer number (1339966320).

Almost surely, 2^51869647200 is an apocalyptic number.

51869647200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51869647200 is an abundant number, since it is smaller than the sum of its proper divisors (141085502880).

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

51869647200 is a wasteful number, since it uses less digits than its factorization.

51869647200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087509 (or 3087496 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 51869647200 in words is "fifty-one billion, eight hundred sixty-nine million, six hundred forty-seven thousand, two hundred".