51695473752 has 256 divisors, whose sum is σ = 163388736000. Its totient is φ = 15013154304.

The previous prime is 51695473729. The next prime is 51695473769. The reversal of 51695473752 is 25737459615.

It is a happy number.

51695473752 is a `hidden beast` number, since 5 + 1 + 69 + 547 + 37 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15630483 + ... + 15633789.

It is an arithmetic number, because the mean of its divisors is an integer number (638237250).

Almost surely, 2^51695473752 is an apocalyptic number.

51695473752 is a gapful number since it is divisible by the number (52) 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 51695473752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81694368000).

51695473752 is an abundant number, since it is smaller than the sum of its proper divisors (111693262248).

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

51695473752 is a wasteful number, since it uses less digits than its factorization.

51695473752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3647 (or 3637 counting only the distinct ones).

The product of its digits is 7938000, while the sum is 54.

The spelling of 51695473752 in words is "fifty-one billion, six hundred ninety-five million, four hundred seventy-three thousand, seven hundred fifty-two".