51125004566840 has 64 divisors (see below), whose sum is σ = 120334910256000. Its totient is φ = 19522977295360.

The previous prime is 51125004566813. The next prime is 51125004566843. The reversal of 51125004566840 is 4866540052115.

It is a super-2 number, since 2×51125004566840² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125004566843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247499456 + ... + 247705935.

It is an arithmetic number, because the mean of its divisors is an integer number (1880232972750).

Almost surely, 2^{51125004566840} is an apocalyptic number.

It is an amenable number.

51125004566840 is an abundant number, since it is smaller than the sum of its proper divisors (69209905689160).

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

51125004566840 is a wasteful number, since it uses less digits than its factorization.

51125004566840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495205520 (or 495205516 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 51125004566840 in words is "fifty-one trillion, one hundred twenty-five billion, four million, five hundred sixty-six thousand, eight hundred forty".