51611455666144 has 48 divisors (see below), whose sum is σ = 110851023830400. Its totient is φ = 23458971007360.

The previous prime is 51611455666129. The next prime is 51611455666159. The reversal of 51611455666144 is 44166655411615.

It is an interprime number because it is at equal distance from previous prime (51611455666129) and next prime (51611455666159).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8204157 + ... + 13058755.

It is an arithmetic number, because the mean of its divisors is an integer number (2309396329800).

Almost surely, 2^{51611455666144} is an apocalyptic number.

It is an amenable number.

51611455666144 is an abundant number, since it is smaller than the sum of its proper divisors (59239568164256).

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

51611455666144 is a wasteful number, since it uses less digits than its factorization.

51611455666144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884823 (or 4884815 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 55.

The spelling of 51611455666144 in words is "fifty-one trillion, six hundred eleven billion, four hundred fifty-five million, six hundred sixty-six thousand, one hundred forty-four".