51544430380685 has 8 divisors (see below), whose sum is σ = 67476345225696. Its totient is φ = 37486858458640.

The previous prime is 51544430380679. The next prime is 51544430380691. The reversal of 51544430380685 is 58608303444515.

It is an interprime number because it is at equal distance from previous prime (51544430380679) and next prime (51544430380691).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51544430380685 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51544430380685.

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, 468585730679 + ... + 468585730788.

It is an arithmetic number, because the mean of its divisors is an integer number (8434543153212).

Almost surely, 2^{51544430380685} is an apocalyptic number.

51544430380685 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51544430380685 is a deficient number, since it is larger than the sum of its proper divisors (15931914845011).

51544430380685 is a wasteful number, since it uses less digits than its factorization.

51544430380685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937171461483.

The product of its (nonzero) digits is 27648000, while the sum is 56.

The spelling of 51544430380685 in words is "fifty-one trillion, five hundred forty-four billion, four hundred thirty million, three hundred eighty thousand, six hundred eighty-five".