51184457078 has 4 divisors (see below), whose sum is σ = 76776685620. Its totient is φ = 25592228538.

The previous prime is 51184457059. The next prime is 51184457081. The reversal of 51184457078 is 87075448115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87075448115 = 5 ⋅17415089623.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12796114268 + ... + 12796114271.

It is an arithmetic number, because the mean of its divisors is an integer number (19194171405).

Almost surely, 2^51184457078 is an apocalyptic number.

51184457078 is a deficient number, since it is larger than the sum of its proper divisors (25592228542).

51184457078 is a wasteful number, since it uses less digits than its factorization.

51184457078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25592228541.

The product of its (nonzero) digits is 1254400, while the sum is 50.

The spelling of 51184457078 in words is "fifty-one billion, one hundred eighty-four million, four hundred fifty-seven thousand, seventy-eight".