51025310664 has 128 divisors (see below), whose sum is σ = 134226892800. Its totient is φ = 16132976640.

The previous prime is 51025310647. The next prime is 51025310681. The reversal of 51025310664 is 46601352015.

51025310664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51025310647) and next prime (51025310681).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46768759 + ... + 46769849.

It is an arithmetic number, because the mean of its divisors is an integer number (1048647600).

Almost surely, 2^51025310664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51025310664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67113446400).

51025310664 is an abundant number, since it is smaller than the sum of its proper divisors (83201582136).

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

51025310664 is a wasteful number, since it uses less digits than its factorization.

51025310664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 51025310664 its reverse (46601352015), we get a palindrome (97626662679).

The spelling of 51025310664 in words is "fifty-one billion, twenty-five million, three hundred ten thousand, six hundred sixty-four".