51210545364 has 36 divisors (see below), whose sum is σ = 141216959520. Its totient is φ = 15518346960.

The previous prime is 51210545311. The next prime is 51210545369. The reversal of 51210545364 is 46354501215.

51210545364 is a `hidden beast` number, since 5 + 12 + 105 + 4 + 536 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51210545369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64659384 + ... + 64660175.

It is an arithmetic number, because the mean of its divisors is an integer number (3922693320).

Almost surely, 2^51210545364 is an apocalyptic number.

It is an amenable number.

51210545364 is an abundant number, since it is smaller than the sum of its proper divisors (90006414156).

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

51210545364 is a wasteful number, since it uses less digits than its factorization.

51210545364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129319580 (or 129319575 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 51210545364 in words is "fifty-one billion, two hundred ten million, five hundred forty-five thousand, three hundred sixty-four".