51651543621652 has 24 divisors (see below), whose sum is σ = 97344420104736. Its totient is φ = 23838898136928.

The previous prime is 51651543621641. The next prime is 51651543621707. The reversal of 51651543621652 is 25612634515615.

51651543621652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 51651543621652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174858 + ... + 10231489.

It is an arithmetic number, because the mean of its divisors is an integer number (4056017504364).

Almost surely, 2^{51651543621652} is an apocalyptic number.

51651543621652 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51651543621652 is a deficient number, since it is larger than the sum of its proper divisors (45692876483084).

51651543621652 is a wasteful number, since it uses less digits than its factorization.

51651543621652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493447 (or 11493445 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 52.

The spelling of 51651543621652 in words is "fifty-one trillion, six hundred fifty-one billion, five hundred forty-three million, six hundred twenty-one thousand, six hundred fifty-two".