51245573760 has 96 divisors (see below), whose sum is σ = 176957391780. Its totient is φ = 13665484800.

The previous prime is 51245573719. The next prime is 51245573761. The reversal of 51245573760 is 6737554215.

It is a happy number.

51245573760 is a `hidden beast` number, since 5 + 1 + 2 + 4 + 5 + 573 + 76 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49422625344 + 1822948416 = 222312^2 + 42696^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×51245573760² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51245573761) 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, 4442641 + ... + 4454160.

Almost surely, 2^51245573760 is an apocalyptic number.

It is an amenable number.

51245573760 is an abundant number, since it is smaller than the sum of its proper divisors (125711818020).

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

51245573760 is a wasteful number, since it uses less digits than its factorization.

51245573760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8896826 (or 8896811 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 45.

The spelling of 51245573760 in words is "fifty-one billion, two hundred forty-five million, five hundred seventy-three thousand, seven hundred sixty".