51644155560 has 64 divisors (see below), whose sum is σ = 155151244800. Its totient is φ = 13752327936.

The previous prime is 51644155553. The next prime is 51644155567. The reversal of 51644155560 is 6555144615.

It is an interprime number because it is at equal distance from previous prime (51644155553) and next prime (51644155567).

It is not an unprimeable number, because it can be changed into a prime (51644155567) 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, 218424 + ... + 388583.

It is an arithmetic number, because the mean of its divisors is an integer number (2424238200).

Almost surely, 2^51644155560 is an apocalyptic number.

It is an amenable number.

51644155560 is an abundant number, since it is smaller than the sum of its proper divisors (103507089240).

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

51644155560 is a wasteful number, since it uses less digits than its factorization.

51644155560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607730 (or 607726 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 51644155560 in words is "fifty-one billion, six hundred forty-four million, one hundred fifty-five thousand, five hundred sixty".