51549021336 has 64 divisors (see below), whose sum is σ = 135860244480. Its totient is φ = 16274903040.

The previous prime is 51549021287. The next prime is 51549021389. The reversal of 51549021336 is 63312094515.

It is a junction number, because it is equal to n+sod(n) for n = 51549021294 and 51549021303.

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 15 ways as a sum of consecutive naturals, for example, 702121 + ... + 772056.

It is an arithmetic number, because the mean of its divisors is an integer number (2122816320).

Almost surely, 2^51549021336 is an apocalyptic number.

It is an amenable number.

51549021336 is an abundant number, since it is smaller than the sum of its proper divisors (84311223144).

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

51549021336 is a wasteful number, since it uses less digits than its factorization.

51549021336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474264 (or 1474260 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 51549021336 in words is "fifty-one billion, five hundred forty-nine million, twenty-one thousand, three hundred thirty-six".