51027770220644 has 48 divisors (see below), whose sum is σ = 107887944528000. Its totient is φ = 20629123358976.

The previous prime is 51027770220611. The next prime is 51027770220649. The reversal of 51027770220644 is 44602207772015.

It is not an unprimeable number, because it can be changed into a prime (51027770220649) 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 15 ways as a sum of consecutive naturals, for example, 205706219 + ... + 205954130.

It is an arithmetic number, because the mean of its divisors is an integer number (2247665511000).

Almost surely, 2^{51027770220644} is an apocalyptic number.

It is an amenable number.

51027770220644 is an abundant number, since it is smaller than the sum of its proper divisors (56860174307356).

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

51027770220644 is a wasteful number, since it uses less digits than its factorization.

51027770220644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411660612 (or 411660610 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 47.

Adding to 51027770220644 its reverse (44602207772015), we get a palindrome (95629977992659).

The spelling of 51027770220644 in words is "fifty-one trillion, twenty-seven billion, seven hundred seventy million, two hundred twenty thousand, six hundred forty-four".