51778016926 has 4 divisors (see below), whose sum is σ = 77667025392. Its totient is φ = 25889008462.

The previous prime is 51778016923. The next prime is 51778016959. The reversal of 51778016926 is 62961087715.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51778016923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12944504230 + ... + 12944504233.

It is an arithmetic number, because the mean of its divisors is an integer number (19416756348).

Almost surely, 2^51778016926 is an apocalyptic number.

51778016926 is a deficient number, since it is larger than the sum of its proper divisors (25889008466).

51778016926 is a wasteful number, since it uses less digits than its factorization.

51778016926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25889008465.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 51778016926 in words is "fifty-one billion, seven hundred seventy-eight million, sixteen thousand, nine hundred twenty-six".