51651551255 has 16 divisors (see below), whose sum is σ = 62082370944. Its totient is φ = 41254298400.

The previous prime is 51651551251. The next prime is 51651551293. The reversal of 51651551255 is 55215515615.

It is a happy number.

It is not a de Polignac number, because 51651551255 - 2² = 51651551251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651551251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10223480 + ... + 10228530.

It is an arithmetic number, because the mean of its divisors is an integer number (3880148184).

Almost surely, 2^51651551255 is an apocalyptic number.

51651551255 is a deficient number, since it is larger than the sum of its proper divisors (10430819689).

51651551255 is a wasteful number, since it uses less digits than its factorization.

51651551255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966.

The product of its digits is 187500, while the sum is 41.

The spelling of 51651551255 in words is "fifty-one billion, six hundred fifty-one million, five hundred fifty-one thousand, two hundred fifty-five".