51250420064 has 24 divisors (see below), whose sum is σ = 106834516488. Its totient is φ = 24117844480.

The previous prime is 51250420057. The next prime is 51250420097. The reversal of 51250420064 is 46002405215.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 47104622 + ... + 47105709.

It is an arithmetic number, because the mean of its divisors is an integer number (4451438187).

Almost surely, 2^51250420064 is an apocalyptic number.

It is an amenable number.

51250420064 is an abundant number, since it is smaller than the sum of its proper divisors (55584096424).

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

51250420064 is a wasteful number, since it uses less digits than its factorization.

51250420064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94210358 (or 94210350 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 51250420064 its reverse (46002405215), we get a palindrome (97252825279).

The spelling of 51250420064 in words is "fifty-one billion, two hundred fifty million, four hundred twenty thousand, sixty-four".