51675291684 has 135 divisors (see below), whose sum is σ = 137761593123. Its totient is φ = 16890933888.

The previous prime is 51675291671. The next prime is 51675291691. The reversal of 51675291684 is 48619257615.

It is a happy number.

The square root of 51675291684 is 227322.

It is a perfect power (a square), and thus also a powerful number.

51675291684 is a `hidden beast` number, since 51 + 6 + 7 + 529 + 1 + 68 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14023770084 + 37651521600 = 118422^2 + 194040^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51675291684.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 298701022 + ... + 298701194.

Almost surely, 2^51675291684 is an apocalyptic number.

51675291684 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51675291684 is the 227322-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51675291684

51675291684 is an abundant number, since it is smaller than the sum of its proper divisors (86086301439).

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

51675291684 is an equidigital number, since it uses as much as digits as its factorization.

51675291684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 251 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 51675291684 in words is "fifty-one billion, six hundred seventy-five million, two hundred ninety-one thousand, six hundred eighty-four".