51611846854 has 4 divisors (see below), whose sum is σ = 77417770284. Its totient is φ = 25805923426.

The previous prime is 51611846851. The next prime is 51611846857. The reversal of 51611846854 is 45864811615.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51611846851) and next prime (51611846857).

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 51611846798 and 51611846807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51611846851) 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 as a sum of consecutive naturals, namely, 12902961712 + ... + 12902961715.

It is an arithmetic number, because the mean of its divisors is an integer number (19354442571).

Almost surely, 2^51611846854 is an apocalyptic number.

51611846854 is a deficient number, since it is larger than the sum of its proper divisors (25805923430).

51611846854 is a wasteful number, since it uses less digits than its factorization.

51611846854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25805923429.

The product of its digits is 921600, while the sum is 49.

The spelling of 51611846854 in words is "fifty-one billion, six hundred eleven million, eight hundred forty-six thousand, eight hundred fifty-four".