51867057580 has 48 divisors (see below), whose sum is σ = 122399331264. Its totient is φ = 18318263040.

The previous prime is 51867057569. The next prime is 51867057581. The reversal of 51867057580 is 8575076815.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (51867057581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4330731 + ... + 4342690.

It is an arithmetic number, because the mean of its divisors is an integer number (2549986068).

Almost surely, 2^51867057580 is an apocalyptic number.

It is an amenable number.

51867057580 is an abundant number, since it is smaller than the sum of its proper divisors (70532273684).

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

51867057580 is a wasteful number, since it uses less digits than its factorization.

51867057580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8673466 (or 8673464 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 52.

The spelling of 51867057580 in words is "fifty-one billion, eight hundred sixty-seven million, fifty-seven thousand, five hundred eighty".